Gaya APA

M.PD, D, S, R, ,. (). Speaking English is Easy (Cet 1 Yogyakarta). Jakarta: PUSTAKA WIDYATAMA.

Gaya MLA

M.PD, DRS., Slamet, Riyanto, ,. "Speaking English is Easy". Cet 1 Yogyakarta Jakarta: PUSTAKA WIDYATAMA, . Text.