Παραπομπή σε μορφή APA (7η εκδ.)

Ortiz, E. M., & Mena, M. M. (1992). The economic impact of tourism in the Philippines. The University of the Philippines, Asian Institute of Tourism.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ortiz, Evangeline M., και Miguela M. Mena. The Economic Impact of Tourism in the Philippines. Quezon City: The University of the Philippines, Asian Institute of Tourism, 1992.

Παραπομπή σε μορφή MLA (9th εκδ.)

Ortiz, Evangeline M., και Miguela M. Mena. The Economic Impact of Tourism in the Philippines. The University of the Philippines, Asian Institute of Tourism, 1992.