Cita APA (7th ed.)

Kotler Philip & Armstrong Gary. (2012). Principles of Marketing (part-2) (14th ed.). Pearson.

Cita Chicago (17th ed.)

Kotler Philip i Armstrong Gary. Principles of Marketing (part-2). 14th ed. Newjersey: Pearson, 2012.

Cita MLA (9th ed.)

Kotler Philip i Armstrong Gary. Principles of Marketing (part-2). 14th ed. Pearson, 2012.