APA (7th ed.) Citation

(1990). Aves. Balgarska Akad. na Naukite.

Chicago Style (17th ed.) Citation

Aves. Sofija: Balgarska Akad. na Naukite, 1990.

MLA (9th ed.) Citation

Aves. Balgarska Akad. na Naukite, 1990.

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