Gaya APA
Hull, J., proctor, S. (1991).
interchange english for international communication/Jack C.Richard (Cet.ke-1).
Australia:
Cambridge University Press.
Gaya MLA
Hull, Jonathan., proctor, Susan.
"interchange english for international communication/Jack C.Richard".
Cet.ke-1
Australia:
Cambridge University Press,
1991.
Text.