Gaya APA
Hagen, B, S, A, R, S, K, S, A. (2011).
Fundamentals of English Grammar Workbook .
:
Pearson Longman.
Gaya MLA
Hagen, Betty, Schrampfer, Azar;, Rachel, Spack, Koch;, Stacy, A..
"Fundamentals of English Grammar Workbook".
:
Pearson Longman,
2011.
Text.