Gaya APA

Richards, J, C. (1986). Inter change English international communication: Student book / Jack C.Richards;illustrator, Jack and Judith De Graffenried et.al (Cet.ke-13). : Cambride.

Gaya MLA

Richards, Jack, C. "Inter change English international communication: Student book / Jack C.Richards;illustrator, Jack and Judith De Graffenried et.al". Cet.ke-13 : Cambride, 1986. Referensi.