Antiporda, J. G. (2003). Walang exemption balik number coding. Kabayan.
Chicago Style (17th ed.) CitationAntiporda, Jefferson G. "Walang Exemption Balik Number Coding." Kabayan 2003.
MLA (9th ed.) CitationAntiporda, Jefferson G. "Walang Exemption Balik Number Coding." Kabayan, 2003.
Warning: These citations may not always be 100% accurate.