Gaya APA

1986-, M, Y. (2017). Basic grammar in speaking : improving your speaking skills by grammatical guidance (Cet. 1). Yogyakarta: CV Pustaka Ilmu Group.

Gaya MLA

1986-, Muhammad, Yahrif,. "Basic grammar in speaking : improving your speaking skills by grammatical guidance". Cet. 1 Yogyakarta: CV Pustaka Ilmu Group, 2017. Text.