Gaya APA

Kotler, P., Amstrong, G. (2013). Principles of marketing Horizon Edition ( Fourteenth Edition ) (Ed.ke-14). Harlow England: Pearson Education Limited.

Gaya MLA

Kotler, Philip., Amstrong, Gary. "Principles of marketing Horizon Edition ( Fourteenth Edition )". Ed.ke-14 Harlow England: Pearson Education Limited, 2013. Textbook.