APA引文

Cassels, J. (1960). How to sell successfully by direct mail. Business publications.

Chicago Edition Citation

Cassels, J.W.W. How to Sell Successfully by Direct Mail. London: Business publications, 1960.

MLA引文

Cassels, J.W.W. How to Sell Successfully by Direct Mail. Business publications, 1960.

警告：這些引文格式不一定是100％准確.