Gaya APA

Porterfield, J, D. (1996). Teleselling : a self-teaching guide / James D. Porterfield (Edisi yang diperbaharui). New York: John Wiley n Sons.

Gaya MLA

Porterfield, James, D.. "Teleselling : a self-teaching guide / James D. Porterfield". Edisi yang diperbaharui New York: John Wiley n Sons, 1996. Textbook.