Jantsch, J. (2010). Referral engine: Teaching your business to market itself. Portofolio.
芝加哥风格引文Jantsch, John. Referral Engine: Teaching Your Business to Market Itself. London: Portofolio, 2010.
MLA引文Jantsch, John. Referral Engine: Teaching Your Business to Market Itself. Portofolio, 2010.
警告：这些引文格式不一定是100％准确.