Gaya APA

Suprihatin, ., M.Pd, E, H, ,, S. (2019). The implementation of e-learning in writing at the firs semester students of environmental engineering study program . Yogyakarta: Prodi Bahasa Inggris UMBY.

Gaya MLA

Suprihatin, ., M.Pd, Elysa, Hartati, ,, S.pd.,. "The implementation of e-learning in writing at the firs semester students of environmental engineering study program". Yogyakarta: Prodi Bahasa Inggris UMBY, 2019. Text.