Sheldon, B. (1994). SONG RATE AND FERTILITY IN THE CHAFFINCH.
Čikaški stil citiranja (17. izdanje)Sheldon, B. SONG RATE AND FERTILITY IN THE CHAFFINCH. 1994.
MLA način citiranja (9. izdanje)Sheldon, B. SONG RATE AND FERTILITY IN THE CHAFFINCH. 1994.
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