APA Style
Azar, Betty Schrampfer. (2009).
Understanding and Using English Grammar with Answer Key ( + CD Audio ) .
Los Angeles:
Pearson - Longman.
Chicago Style
Azar, Betty Schrampfer.
Understanding and Using English Grammar with Answer Key ( + CD Audio ).
Los Angeles:
Pearson - Longman,
2009.
Text.
MLA Style
Azar, Betty Schrampfer.
Understanding and Using English Grammar with Answer Key ( + CD Audio ).
Los Angeles:
Pearson - Longman,
2009.
Text.
Turabian Style
Azar, Betty Schrampfer.
Understanding and Using English Grammar with Answer Key ( + CD Audio ).
Los Angeles:
Pearson - Longman,
2009.
Print.