Παραπομπή APA

Hanson, P. (1970). Keypunching (2nd ed.). Prentice-Hall of India.

Παραπομπή Chicago Style

Hanson, Peggy. Keypunching. 2nd ed. New Jersey: Prentice-Hall of India, 1970.

Παραπομπή MLA

Hanson, Peggy. Keypunching. 2nd ed. Prentice-Hall of India, 1970.