Cita APA (7th ed.)

Wilbers, S. (2000). Keys to great writing. Writer's Digest Books.

Cita Chicago (17th ed.)

Wilbers, Stephen. Keys to Great Writing. Cincinnati, Ohio: Writer's Digest Books, 2000.

Cita MLA (9th ed.)

Wilbers, Stephen. Keys to Great Writing. Writer's Digest Books, 2000.