Gaya APA
Purba, S. (2024).
Speaking English in Professional Situations (cet. 1).
Yogyakarta:
Penerbit Terang Sejati.
Gaya MLA
Purba, Sanaha.
"Speaking English in Professional Situations".
cet. 1
Yogyakarta:
Penerbit Terang Sejati,
2024.
Art Original.