APA Style
LEO, Sutanto. (2007).
Essay writing : English for academic purpose .
Yogyakarta:
Informatila.
Chicago Style
LEO, Sutanto.
Essay writing : English for academic purpose.
Yogyakarta:
Informatila,
2007.
.
MLA Style
LEO, Sutanto.
Essay writing : English for academic purpose.
Yogyakarta:
Informatila,
2007.
.
Turabian Style
LEO, Sutanto.
Essay writing : English for academic purpose.
Yogyakarta:
Informatila,
2007.
.