Gaya APA
LEVIN, J., NOLAN, J, F. (1996).
Principles of classroom management : a professional decision making model .
Leiden:
simon & Schuter.
Gaya MLA
LEVIN, James., NOLAN, James, F.
"Principles of classroom management : a professional decision making model".
Leiden:
simon & Schuter,
1996.
Text.