Cita APA (7a ed.)

Heller, S., & Pettit, E. (1996). The art of newsletters. PBC International.

Cita Chicago Style (17a ed.)

Heller, Steven, y Elinor Pettit. The Art of Newsletters. Glen Cove, N.Y.: PBC International, 1996.

Cita MLA (9a ed.)

Heller, Steven, y Elinor Pettit. The Art of Newsletters. PBC International, 1996.