Just some cleaning up

Hey Everyone,

Just added some references and noticed a couple things. There were 2 citations for the 4th edition textbook, so I removed one of them and corrected some minor details within that reference. Curious if anyone cited the 5th edition textbook but didn't include that in the references. Also, I removed this random sentence "psychologists to measure. Why/why not?" which was between the "T" and "U" citations, and also removed "Some psychometric characteristics of gender diagnosticity measures: Reliability, validity, consistency across domains, and relationship to the Big Five." which seems like another random sentence right at the bottom of the page. Hope this wasn't intentionally put there by anyone for reasons that I am missing right now.