Gaya APA
Collie, J., Slater, S.
(2005).
Speaking 2 student's book.
.
Yogyakarta:
Kanisius.
Gaya MLA
Collie, Joanne., Slater, Stephen.
"Speaking 2 student's book.".
Yogyakarta:
Kanisius,
2005.
Text.