Gaya APA
RICHARD, J, C. (1994).
INTERCHANGE FOURTH EDITION: INTRO STUDENTS BOOK .
JAKARTA BARAT:
CAMBRIDGE UNIVERSITY PRESS.
Gaya MLA
RICHARD, JACK, C.
"INTERCHANGE FOURTH EDITION: INTRO STUDENTS BOOK".
JAKARTA BARAT:
CAMBRIDGE UNIVERSITY PRESS,
1994.
Text.