diff --git a/26-Diversity.Rmd b/26-Diversity.Rmd
index 33ed2f19d..d00fd6bbd 100644
--- a/26-Diversity.Rmd
+++ b/26-Diversity.Rmd
@@ -179,7 +179,8 @@ By contrast, ethnicity (ethnic status) has been defined as "an easily identifiab
 Ethnic identifiers for evaluating whether people share a "common cultural history" include racial, national, tribal, religious, linguistic, or cultural origin or background.\index{diversity!assessment of minority populations}
 Thus, race and ethnicity, though conceptually distinct, are related as race can be an ethnic identifier.\index{diversity!assessment of minority populations}
 
-Researchers have argued that race designations are arbitrary [@Helms2005], that race is a social, cultural, and/or political construct rather than a biological construct [@Yudell2016], that race has no genetic basis [@Yudell2016], that within-race differences are greater than between-race differences [@Zuckerman1990], and that racial categories lack conceptual meaning [@Helms2005].\index{diversity!assessment of minority populations}
+Researchers have argued that race designations are arbitrary [@Helms2005], that race is a social, cultural, and/or political construct rather than a biological construct [@Sternberg2005; @Yudell2016], that race has no genetic basis [@Yudell2016], that within-race differences are greater than between-race differences [@Zuckerman1990], and that racial categories lack conceptual meaning [@Helms2005].\index{diversity!assessment of minority populations}
+According to the American Anthropological Association [-@AAA1998, p. 712], "physical variations in the human species have no meaning except the social ones that humans put on them."\index{diversity!assessment of minority populations}
 However, even though race does not appear to have a genetic or biological basis and therefore appears to be a social construct rather than a biological construct, racism as a social problem is real and is a major issue [@Smedley2005].\index{diversity!assessment of minority populations}
 People are born into different social reactions based on their race.\index{diversity!assessment of minority populations}
 Thus, race is important to consider from a perspective of racialized experiences and discrimination even if the racial categories do not represent underlying biological differences.\index{diversity!assessment of minority populations}