Press. 2017. ISBN 978-0-19-029737-4. OL 26246092M –通过Open Library. Balthazart, Jacques. The Biology of Homosexuality. Oxford University Press. 2012 [27
2017: 19 [2020-04-13]. ISBN 9780199752966. (原始内容存档于2020-04-18). Balthazart, Jacques. The Biology of Homosexuality. Oxford University Press. 2012: 13–14
2017: 19 [2021-01-03]. ISBN 9780199752966. (原始内容存档于2020-10-22). Balthazart, Jacques. The Biology of Homosexuality. Oxford University Press. 2012: 13–14
Press. 2017 [2019-10-20]. ISBN 9780199752966. (原始内容存档于2020-04-18). Balthazart, Jacques. The Biology of Homosexuality. Oxford University Press. 2012 [2019-10-20]