Cita APA

Sommers, N., & Simon, L. (1993). The Harper Collins guide to writing: With sourcebook. New York: Harper Collins.

Citación estilo Chicago

Sommers, Nancy, y Linda Simon. The Harper Collins Guide to Writing: With Sourcebook. New York: Harper Collins, 1993.

Cita MLA

Sommers, Nancy, y Linda Simon. The Harper Collins Guide to Writing: With Sourcebook. New York: Harper Collins, 1993.