APA

Cruickshank A. D., Cruickshank H. (., . (1960). 1001 questions answered about birds. New York: Dodd, Mead & Co.

Chicago

Cruickshank Allan D, Cruickshank Helen (Gere), . 1960. 1001 questions answered about birds. New York: Dodd, Mead & Co.

Harvard

Cruickshank A. D., Cruickshank H. (., . (1960). 1001 questions answered about birds. New York: Dodd, Mead & Co.

MLA

Cruickshank Allan D, Cruickshank Helen (Gere), . 1001 questions answered about birds. New York: Dodd, Mead & Co. 1960.