Gaya APA

Kaufman, A, S. (2005). Essentials of research deseign and methodology: Essentials of behavioral science . New Jersey: John Wiley & Sons,Inc.

Gaya MLA

Kaufman, Alan., S. "Essentials of research deseign and methodology: Essentials of behavioral science". New Jersey: John Wiley & Sons,Inc, 2005. Buku PPS Manajemen.