Gaya APA

Lindsell-Roberts, S. (2004). Strategic business letters and e-mail : hundreds of model letters . Boston: Houghton Mifflin Harcourt.

Gaya MLA

Lindsell-Roberts, Sheryl. "Strategic business letters and e-mail : hundreds of model letters". Boston: Houghton Mifflin Harcourt, 2004. Teks.