Gaya APA

Certo, S, C., Certo, S, T. (2012). Modern Management Concepts and Skills (12th ed). united states of america: Pearson Education.

Gaya MLA

Certo, Samuel, C.., Certo, S., Trevis. "Modern Management Concepts and Skills". 12th ed united states of america: Pearson Education, 2012. Text.