Jantsch, J. (2010). Referral engine: Teaching your business to market itself. Portofolio.
Chicagoスタイル(17版)引用形式Jantsch, John. Referral Engine: Teaching Your Business to Market Itself. London: Portofolio, 2010.
MLA(9版)引用形式Jantsch, John. Referral Engine: Teaching Your Business to Market Itself. Portofolio, 2010.
警告: この引用は必ずしも正確ではありません.