Gopez, D. P., & Cabrera, H. P. (2000). Marketing plan. University of the Philippines Diliman Extension Program in Pampanga.
Lua i Stíl Chicago (17ú heag.)Gopez, Donavie P., agus Henry P. Cabrera. Marketing Plan. Pampanga: University of the Philippines Diliman Extension Program in Pampanga, 2000.
Lua MLA (9ú heag.)Gopez, Donavie P., agus Henry P. Cabrera. Marketing Plan. University of the Philippines Diliman Extension Program in Pampanga, 2000.
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