Παραπομπή APA

Kolah, A. (2013). The art of influencing and selling. Kogan Page.

Παραπομπή Chicago Style

Kolah, Ardi. The Art of Influencing and Selling. London: Kogan Page, 2013.

Παραπομπή MLA

Kolah, Ardi. The Art of Influencing and Selling. Kogan Page, 2013.