Gaya APA
Richards, J, C., Hull, J, &, P, S. (2001).
New interchange. English for international communication. Student book 1 (2001).
:
UK : Cambridge University Press,.
Gaya MLA
Richards, Jack, C., Hull, Jonathan, &, Proctor,, S.
"New interchange. English for international communication. Student book 1".
2001
:
UK : Cambridge University Press,,
2001.
Text.