Gaya APA
Siahaan. (2023).
English for business .
Medan:
Merdeka Kreasi.
Gaya Chicago
Siahaan.
English for business.
Medan:
Merdeka Kreasi,
2023.
Text.
Gaya MLA
Siahaan.
English for business.
Medan:
Merdeka Kreasi,
2023.
Text.
Gaya Turabian
Siahaan.
English for business.
Medan:
Merdeka Kreasi,
2023.
Print.