APA
(2003). SPOKEN ENGLISH 4 for FILIPINO Learners. Manila: REX Bookstore.
Chicago
2003. SPOKEN ENGLISH 4 for FILIPINO Learners. Manila: REX Bookstore.
Harvard
(2003). SPOKEN ENGLISH 4 for FILIPINO Learners. Manila: REX Bookstore.
MLA
SPOKEN ENGLISH 4 for FILIPINO Learners. Manila: REX Bookstore. 2003.