12.1 The Difference Between Sex and Gender
For more information on gender identity and advocacy for transgendered individuals see the Global Action for Trans Equality web site at http://openstax.org/l/trans_equality.
For more gender-related statistics see the Centers for Disease Control and Prevention website at http://openstax.org/l/center_disease_control/ and browse through to pictures like “gender and education” and “gender and health.”
12.3 Sex and Sexuality
For more information about sexual attitudes and practices in countries around the world, see the entire “Attitudes Toward Nonmarital Sex in 24 Countries” article from the Journal of Sex Research at http://openstax.org/l/journal_of_sex_research