Gaya APA
WALKER, S, G, C, M, R.
(2003).
On The Go
.
HONGKONG:
Longman Asia ELT.
Gaya MLA
WALKER, STEVEN, GERSHON,, CHRIS, MARES,, RICHARD.
"On The Go".
HONGKONG:
Longman Asia ELT,
2003.
Text.