Cita APA (7th ed.)

Ullmann, L. P., & Krasner, L. (1969). A psychological approach to abnormal behavior. Prentice-Hall.

Cita Chicago (17th ed.)

Ullmann, Leonard P., i Leonard Krasner. A Psychological Approach to Abnormal Behavior. Englewood Cliffs, N. J: Prentice-Hall, 1969.

Cita MLA (9th ed.)

Ullmann, Leonard P., i Leonard Krasner. A Psychological Approach to Abnormal Behavior. Prentice-Hall, 1969.