Gaya APA
Hakim, M, A, R.
(2014).
English speaking materials for introvert students
(
cet.1)
.
Bogor:
IPB Press.
Gaya MLA
Hakim, M, Arif, Rahman.
"English speaking materials for introvert students".
cet.1
Bogor:
IPB Press,
2014.
Text.