Rugh, R. (1951). The Frog: Its reproduction and development. McGraw-Hill Book Co., Inc.
Lua i Stíl Chicago (17ú heag.)Rugh, Roberts. The Frog: Its Reproduction and Development. New Delhi: McGraw-Hill Book Co., Inc, 1951.
Lua MLA (9ú heag.)Rugh, Roberts. The Frog: Its Reproduction and Development. McGraw-Hill Book Co., Inc, 1951.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.