Gaya APA
Azar, B, S. (2003).
Fundamentals Of English Grammar : Third Edition With Answer Key (Third Edition (International Edition)).
New York:
Longman.
Gaya MLA
Azar, Betty, Schrampfer.
"Fundamentals Of English Grammar : Third Edition With Answer Key".
Third Edition (International Edition)
New York:
Longman,
2003.
Buku Tex.