Gaya APA
Azar, Betty Schrampfer. (2009).
Understanding and using english grammar: fourth edition (4th ed.).
:
Pearson Education.
Gaya Chicago
Azar, Betty Schrampfer.
Understanding and using english grammar: fourth edition.
4th ed.
:
Pearson Education,
2009.
Text.
Gaya MLA
Azar, Betty Schrampfer.
Understanding and using english grammar: fourth edition.
4th ed.
:
Pearson Education,
2009.
Text.
Gaya Turabian
Azar, Betty Schrampfer.
Understanding and using english grammar: fourth edition.
4th ed.
:
Pearson Education,
2009.
Print.