Gaya APA

RICHARDS, J., LONG, M. (1981). BREAKTHROUHG 2 : A COURSE ENGLISH COMMUNICATION PRACTICE (CET.5). NEW JERSEY: .

Gaya MLA

RICHARDS, J.C.., LONG, M.N.. "BREAKTHROUHG 2 : A COURSE ENGLISH COMMUNICATION PRACTICE". CET.5 NEW JERSEY: , 1981. Prodi S1 Sastra Inggris.