Gaya APA
Sergiovanni, T, J., Starratt, R, J. (1993).
Supervision a Redefinition Fifth Edition .
Singapore:
McGraw-Hill Book.
Gaya MLA
Sergiovanni, Thomas, J.., Starratt, Robert, J..
"Supervision a Redefinition Fifth Edition".
Singapore:
McGraw-Hill Book,
1993.
Book.