Cita APA

Tolbert, E. L., & Tolbert, E. L. (1959). Introduction to counseling. New York, New York: McGraw-Hill.

Citación estilo Chicago

Tolbert, E. L., y E. L. Tolbert. Introduction to Counseling. New York, New York: McGraw-Hill, 1959.

Cita MLA

Tolbert, E. L., y E. L. Tolbert. Introduction to Counseling. New York, New York: McGraw-Hill, 1959.