Gaya APA

Lado, R. (1972). Lado English Series - A complete course in English as a second language. Book 4 (1). USA: Regents Publising Company, Inc.

Gaya MLA

Lado, Robert. "Lado English Series - A complete course in English as a second language. Book 4". 1 USA: Regents Publising Company, Inc, 1972. Buku Analog.