Gaya APA

WILLIS-PENCE-GONZALEZ, . (1976). GRAMMAR AND COMPOSITION SKILLS (3). CANADA: THE DRYDEN PRESS.

Gaya MLA

WILLIS-PENCE-GONZALEZ, . "GRAMMAR AND COMPOSITION SKILLS". 3 CANADA: THE DRYDEN PRESS, 1976. Prodi S1 Sastra Inggris.