Gaya APA

SUKUR, S, G., Wulandari, R, S. (2017). Easy English Conversation at the Office . Jakarta: GRASINDO.

Gaya MLA

SUKUR, SILVESTER, GORIDUS., Wulandari, Ratih, Suci. "Easy English Conversation at the Office". Jakarta: GRASINDO, 2017. Text.