Cita APA (7th ed.)

Day, S., McMahan, E., & Funk, R. (1987). Keeping in touch: Writing clearly. Macmillan.

Cita Chicago (17th ed.)

Day, Susan, Elizabeth McMahan, i Robert Funk. Keeping in Touch: Writing Clearly. New York: Macmillan, 1987.

Cita MLA (9th ed.)

Day, Susan, et al. Keeping in Touch: Writing Clearly. Macmillan, 1987.