Gaya APA

Syov, W, B, V., Syoc, F, S, V. (1971). Lets learn english: Advanced course book 5 . New York: American Book Company.

Gaya MLA

Syov, W., Bryce, Van., Syoc, Florence, S., Van. "Lets learn english: Advanced course book 5". New York: American Book Company, 1971. Text.