Gaya APA
Sarwono, Jonathan. (2013).
English for academic purpose (ed.1).
Medan:
ANDI Yogyakarta.
Gaya Chicago
Sarwono, Jonathan.
English for academic purpose.
ed.1
Medan:
ANDI Yogyakarta,
2013.
SASTRA.
Gaya MLA
Sarwono, Jonathan.
English for academic purpose.
ed.1
Medan:
ANDI Yogyakarta,
2013.
SASTRA.
Gaya Turabian
Sarwono, Jonathan.
English for academic purpose.
ed.1
Medan:
ANDI Yogyakarta,
2013.
SASTRA.