Gaya APA

GRAVER, B, D. (1979). ADVANCED ENGLISH PRACTICE WITH KEY, SECOND EDITION . NEW YORK: OXFORD UNIVERSITY PRESS.

Gaya MLA

GRAVER, B, D. "ADVANCED ENGLISH PRACTICE WITH KEY, SECOND EDITION". NEW YORK: OXFORD UNIVERSITY PRESS, 1979. Prodi S1 Sastra Inggris.