Gaya APA

YATES, C, S, J. (1987). ECONOMICS : ENGLISH FOR ACADEMIC PURPOSES SERIES . NEW JERSEY: McGRAW-HILL, Inc.

Gaya MLA

YATES, C, ST, J. "ECONOMICS : ENGLISH FOR ACADEMIC PURPOSES SERIES". NEW JERSEY: McGRAW-HILL, Inc, 1987. Prodi S1 Sastra Inggris.