Gaya APA
Yahrif, M. (2021).
The Art of English for University Students (Cet 1).
Yogyakarta:
cv. pustaka ilmu grup yoyakarta.
Gaya MLA
Yahrif, Muhammad.
"The Art of English for University Students".
Cet 1
Yogyakarta:
cv. pustaka ilmu grup yoyakarta,
2021.
Transparency.