APA aipamena

Jantsch, J. (2010). Referral engine: Teaching your business to market itself. Portofolio.

Chicago Style aipamena

Jantsch, John. Referral Engine: Teaching Your Business to Market Itself. London: Portofolio, 2010.

MLA aipamena

Jantsch, John. Referral Engine: Teaching Your Business to Market Itself. Portofolio, 2010.