Bretschneider, L. H. (1947). Sexual endocrinology of non-mammalian vertebrates. Elsevier Publishing Company, Inc.
Lua i Stíl Chicago (17ú heag.)Bretschneider, Ludwig Hermann. Sexual Endocrinology of Non-mammalian Vertebrates. New York: Elsevier Publishing Company, Inc, 1947.
Lua MLA (9ú heag.)Bretschneider, Ludwig Hermann. Sexual Endocrinology of Non-mammalian Vertebrates. Elsevier Publishing Company, Inc, 1947.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.