APA

Rickard H. C., . (1971). Behavioral intervention in human problems. New York: Pergamon Press.

Chicago

Rickard Henry C, . 1971. Behavioral intervention in human problems. New York: Pergamon Press.

Harvard

Rickard H. C., . (1971). Behavioral intervention in human problems. New York: Pergamon Press.

MLA

Rickard Henry C, . Behavioral intervention in human problems. New York: Pergamon Press. 1971.