Cita APA (7a ed.)

Sundel, M., & Sundel, S. S. (1982). Behavior modification in the human services: A systematic introduction to concepts and applications (2nd ed.). Prentice-Hall.

Cita Chicago Style (17a ed.)

Sundel, Martin, y Sandra Stone Sundel. Behavior Modification in the Human Services: A Systematic Introduction to Concepts and Applications. 2nd ed. Englewood Cliffs, NJ: Prentice-Hall, 1982.

Cita MLA (9a ed.)

Sundel, Martin, y Sandra Stone Sundel. Behavior Modification in the Human Services: A Systematic Introduction to Concepts and Applications. 2nd ed. Prentice-Hall, 1982.