APA Style
Harris, M.
(2012).
CD New Challenges 2: ActiveTeach
(
Jil.2)
.
New York:
Pearson Longman Asia ELT.
MLA Style
Harris, Michael.
"CD New Challenges 2: ActiveTeach".
Jil.2
New York:
Pearson Longman Asia ELT,
2012.
Buku SMP Athalia.