APA

Steen E. B., . (1971). Dictionary of biology. New York: Barnes & Noble.

Chicago

Steen Edwin B, . 1971. Dictionary of biology. New York: Barnes & Noble.

Harvard

Steen E. B., . (1971). Dictionary of biology. New York: Barnes & Noble.

MLA

Steen Edwin B, . Dictionary of biology. New York: Barnes & Noble. 1971.