Gaya APA
Stupak, S, A.
(1997).
Seven Practice Tests Achieving Higher TOEIC Test Scores Volume 2
.
Hongkong:
Longman.
Gaya MLA
Stupak, Steven, A.
"Seven Practice Tests Achieving Higher TOEIC Test Scores Volume 2".
Hongkong:
Longman,
1997.
Text.