Gaya APA

RICHARDS, J, C. (1991). INTERCHANGE : ENGLISH FOR INTERNATIONAL COMMUNICATION, 2 STUDENT'S BOOK . NEW YORK: CAMBRIDGE UNIVERSITY PRESS.

Gaya MLA

RICHARDS, JACK, C.. "INTERCHANGE : ENGLISH FOR INTERNATIONAL COMMUNICATION, 2 STUDENT'S BOOK". NEW YORK: CAMBRIDGE UNIVERSITY PRESS, 1991. Prodi S1 Sastra Inggris.