APA (7th ed.) Citation

Gray, A. P. (1958). Bird hybrids: A check-list with bibliography. CAB.

Chicago Style (17th ed.) Citation

Gray, Annie P. Bird Hybrids: A Check-list with Bibliography. Farnham Royal, Bucks, England: CAB, 1958.

MLA (9th ed.) Citation

Gray, Annie P. Bird Hybrids: A Check-list with Bibliography. CAB, 1958.