Gaya APA
AZAR, B, S. (1989).
Understanding and using english grammar .
Prentice Hill Regents:
PRENTICE HALL REGENTS.
Gaya MLA
AZAR, BETTY, SCHRAMPFER.
"Understanding and using english grammar".
Prentice Hill Regents:
PRENTICE HALL REGENTS,
1989.
Text.