Gaya APA

Widjaja, G. (2016, 2020). Complete English Grammar And The Exercise Part I and II / Grace Widjaja (Cet. 13, Cet.16). Salatiga: PT Bhuana Ilmu Populer.

Gaya MLA

Widjaja, Grace. "Complete English Grammar And The Exercise Part I and II / Grace Widjaja". Cet. 13, Cet.16 Salatiga: PT Bhuana Ilmu Populer, 2016, 2020. Text.