Gaya APA

Certo, S, C. (2008). Supervision concept and skill-building / Samuel C. Certo (6 th ed). Bandung: McGraw-Hill Irwin.

Gaya MLA

Certo, Samuel, C.. "Supervision concept and skill-building / Samuel C. Certo". 6 th ed Bandung: McGraw-Hill Irwin, 2008. Text.