Gaya APA

Levin, J., Nolan, J, F. (1996). Principles of classroom management : a profesional decision-making model (Ed. 2). United States America: Allyn & Bacon.

Gaya MLA

Levin, James., Nolan, James, F.. "Principles of classroom management : a profesional decision-making model". Ed. 2 United States America: Allyn & Bacon, 1996. Text.