Citazione Stile APA (7a Edizione)

Private Development Corporation of the Philippines. (1973). The tourism industry. Rizal].

Citazione stile Chigago Style (17a edizione)

Private Development Corporation of the Philippines. The Tourism Industry. [Makati: Rizal], 1973.

Citatione MLA (9a ed.)

Private Development Corporation of the Philippines. The Tourism Industry. Rizal], 1973.