APA

Kerlinger F. N., Lee H. B., .Foundations Of Behavioral Research. New York: Harcourt College.

Chicago

Kerlinger Fred N, Lee Howard B, .Foundations Of Behavioral Research. New York: Harcourt College.

Harvard

Kerlinger F. N., Lee H. B., .Foundations Of Behavioral Research. New York: Harcourt College.

MLA

Kerlinger Fred N, Lee Howard B, .New York: Harcourt College. .