Gaya APA
Rizka, H. et al (2015).
TOEFL : test of English as a foreign language : self preparation course .
Yogyakarta:
Pustaka Baru.
Gaya MLA
Rizka, Haira. et al.
"TOEFL : test of English as a foreign language : self preparation course".
Yogyakarta:
Pustaka Baru,
2015.
Text.