Lua APA (7ú heag.)

Whitney, L. F., & Hahnel, P. (1955). All about guppies. Practical Science Pub. Co..

Lua i Stíl Chicago (17ú heag.)

Whitney, Leon Fradley, agus Paul Hahnel. All About Guppies. Orange, Conn.: Practical Science Pub. Co., 1955.

Lua MLA (8ú heag.)

Whitney, Leon Fradley, agus Paul Hahnel. All About Guppies. Practical Science Pub. Co., 1955.

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