Gaya APA
LEO, S., GROTH, C, [.
(2013).
ENGLISH for academic purpose :
(
Ed. 2)
.
Yogyakarta:
Andi Offset.
Gaya MLA
LEO, Sutanto., GROTH, Cherly, [ed.].
"ENGLISH for academic purpose :".
Ed. 2
Yogyakarta:
Andi Offset,
2013.
Buku.