Ramos, S. (2014). What's a lifer and other frequently asked questions about birding. Animal Scene.
Citace podle Chicago (17th ed.)Ramos, Sylvia. "What's a Lifer and Other Frequently Asked Questions About Birding." Animal Scene 2014.
Citace podle MLA (9th ed.)Ramos, Sylvia. "What's a Lifer and Other Frequently Asked Questions About Birding." Animal Scene, 2014.
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