Gaya APA
Oeban, R., Soelistyowati, E. (2011).
Focus on English idioms : elementary intermediate advanced .
Tangerang:
Karisma Publishing Group.
Gaya MLA
Oeban, Robert., Soelistyowati, Etty.
"Focus on English idioms : elementary intermediate advanced".
Tangerang:
Karisma Publishing Group,
2011.
Text.