Gaya APA
Azar, B, S. (2002).
Understanding and using english grammar Third Edition (Ed. 3, Cet. Ke-1).
Jakarta:
Logman Person.
Gaya MLA
Azar, Betty, Schrampher.
"Understanding and using english grammar Third Edition".
Ed. 3, Cet. Ke-1
Jakarta:
Logman Person,
2002.
Text.