Gaya APA
al., E., Collie, J.
(2005,2006).
Speaking 1: Student's Book
.
Yogyakarta:
Kanisius.
Gaya MLA
al., Et., Collie, Joane.
"Speaking 1: Student's Book".
Yogyakarta:
Kanisius,
2005,2006.
Text.