APA
(1999). New Horizons in Learning English I. Quezon City: Rex Printing Company, Inc.
Chicago
1999. New Horizons in Learning English I. Quezon City: Rex Printing Company, Inc.
Harvard
(1999). New Horizons in Learning English I. Quezon City: Rex Printing Company, Inc.
MLA
New Horizons in Learning English I. Quezon City: Rex Printing Company, Inc. 1999.
