Gaya APA
Mandarani, V., Taufiq, W. (2017).
Buku Ajar Let’s Learn English Progressively .
Sidoarjo:
UMSIDA Press.
Gaya MLA
Mandarani, Vidya., Taufiq, Wahyu.
"Buku Ajar Let’s Learn English Progressively".
Sidoarjo:
UMSIDA Press,
2017.
Elektronik/Digital.