APA

Zahradník J., Čihař J., . (1979). A field guide in color to animals. New York: Mayflower Books.

Chicago

Zahradník Jiří, Čihař Jiří, . 1979. A field guide in color to animals. New York: Mayflower Books.

Harvard

Zahradník J., Čihař J., . (1979). A field guide in color to animals. New York: Mayflower Books.

MLA

Zahradník Jiří, Čihař Jiří, . A field guide in color to animals. New York: Mayflower Books. 1979.