Gaya APA
Melinda, R. et al (2018).
Comprehensive English Grammar for Beginner .
Yogyakarta:
Yogyakarta.Pustaka Widyatama.
Gaya MLA
Melinda, Renna. et al.
"Comprehensive English Grammar for Beginner".
Yogyakarta:
Yogyakarta.Pustaka Widyatama,
2018.
Koleksi Elektronik.