Gaya APA
Johan, Rita. (2014).
Business English .
Jakarta:
Gramedia Widiasarana Indonesia.
Gaya Chicago
Johan, Rita.
Business English.
Jakarta:
Gramedia Widiasarana Indonesia,
2014.
Buku.
Gaya MLA
Johan, Rita.
Business English.
Jakarta:
Gramedia Widiasarana Indonesia,
2014.
Buku.
Gaya Turabian
Johan, Rita.
Business English.
Jakarta:
Gramedia Widiasarana Indonesia,
2014.
Buku.