Παραπομπή σε μορφή APA (7η εκδ.)

Demate, C. J. M., & Yap, V. (2010). Determinants of the sustainability of duty free shops in clark freeport zone. University of the Philippines Diliman Extension Program in Pampanga.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Demate, Cielo Jane M., και Virginia Yap. Determinants of the Sustainability of Duty Free Shops in Clark Freeport Zone. Pampanga: University of the Philippines Diliman Extension Program in Pampanga, 2010.

Παραπομπή σε μορφή MLA (9th εκδ.)

Demate, Cielo Jane M., και Virginia Yap. Determinants of the Sustainability of Duty Free Shops in Clark Freeport Zone. University of the Philippines Diliman Extension Program in Pampanga, 2010.