Gaya APA

Positive Business Ideas : Proven, Practical and Easy-to-Apply Ideas to Improve Your Performance. (2007). : PT Gramedia Pustaka Utama.

Gaya MLA

Positive Business Ideas : Proven, Practical and Easy-to-Apply Ideas to Improve Your Performance. Cetakan Kelima. : PT Gramedia Pustaka Utama, 2007. Text.