Gaya APA
Adam, B., Natalia, .
(2011).
TOEFL Workshop in 30 minutes
(
Cet. 1)
.
Yogyakarta:
Pustaka Solomon.
Gaya MLA
Adam, Billy., Natalia, .
"TOEFL Workshop in 30 minutes".
Cet. 1
Yogyakarta:
Pustaka Solomon,
2011.
Text.