Hertwig, R., & Kingsley, J. S. (1902). A manual of zoology. H. Holt and Co..
Lua i Stíl Chicago (17ú heag.)Hertwig, Richard, agus J. S. Kingsley. A Manual of Zoology. New York: H. Holt and Co., 1902.
Lua MLA (8ú heag.)Hertwig, Richard, agus J. S. Kingsley. A Manual of Zoology. H. Holt and Co., 1902.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.