APA (7th ed.) Citation

Não informado. (1954). Bird Study. British Trust for Ornithology.

Chicago Style (17th ed.) Citation

Não informado. Bird Study. Herts, Inglaterra: British Trust for Ornithology, 1954.

MLA (8th ed.) Citation

Não informado. Bird Study. British Trust for Ornithology, 1954.

Warning: These citations may not always be 100% accurate.