Gaya APA

Maggs, M. (1978). Programmed English :A Self-Instructional Course Book 4 (Cetakan 1). New York: Grolier International, Inc..

Gaya MLA

Maggs, Margaret. "Programmed English :A Self-Instructional Course Book 4". Cetakan 1 New York: Grolier International, Inc., 1978. Text.