http://www.apa.org/releases/homophob.html
The original article is cited:
'Is Homophobia Associated With Homosexual Arousal?' by Henry E. Adams,
Ph.D.,
Lester W. Wright, Jr., Ph.D. and Bethany A. Lohr, University of Georgia,
in Journal of
Abnormal Psychology, Vol. 105, No. 3, pp 440-445.