Παραπομπή σε μορφή APA (7η εκδ.)

Liles, P., Brendel, L. A., & Krause, R. (1960). Typing mailable letters: Practice projects in placement, punctuation, proofreading, and production. Gregg Pub. Division, McGraw-Hill.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Liles, Parker, Leroy A. Brendel, και Ruthetta Krause. Typing Mailable Letters: Practice Projects in Placement, Punctuation, Proofreading, and Production. New York: Gregg Pub. Division, McGraw-Hill, 1960.

Παραπομπή σε μορφή MLA (8th εκδ.)

Liles, Parker, et al. Typing Mailable Letters: Practice Projects in Placement, Punctuation, Proofreading, and Production. Gregg Pub. Division, McGraw-Hill, 1960.