Gaya APA
Azar, Betty Schrapmer. (2003).
Understanding and using english grammar (3).
United States Of America:
Longman.
Gaya Chicago
Azar, Betty Schrapmer.
Understanding and using english grammar.
3
United States Of America:
Longman,
2003.
Text.
Gaya MLA
Azar, Betty Schrapmer.
Understanding and using english grammar.
3
United States Of America:
Longman,
2003.
Text.
Gaya Turabian
Azar, Betty Schrapmer.
Understanding and using english grammar.
3
United States Of America:
Longman,
2003.
Print.