Gaya APA

Sukur, S, G., Kurniawati, T, Y. (2026). English Speaking Booster for Office Communication . Jakarta: Gramedia Widiasarana Indonesia.

Gaya MLA

Sukur, Silvester, Goridus., Kurniawati, Tri, Yuli. "English Speaking Booster for Office Communication". Jakarta: Gramedia Widiasarana Indonesia, 2026. Text.