Gaya APA
Service, E, T. (2010).
TOEFL ITP: assessment series practice tests volume 1 (cet. 1).
Jakarta:
Penerbit Erlangga.
Gaya MLA
Service, Educational, Testing.
"TOEFL ITP: assessment series practice tests volume 1".
cet. 1
Jakarta:
Penerbit Erlangga,
2010.
Text.