Gaya APA

KON, T. (1991). PRACTICAL ENGLISH USAGE : ENGLISH AS A SECOND LANGUAGE . JAKARTA: BINARUPA AKSARA.

Gaya MLA

KON, TS.. "PRACTICAL ENGLISH USAGE : ENGLISH AS A SECOND LANGUAGE". JAKARTA: BINARUPA AKSARA, 1991. Prodi S1 Sastra Inggris.