Citazione Stile APA (7a Edizione)

Viado, J. (1968). The natural resources position of the Philippines. [publisher not identified].

Citazione stile Chigago Style (17a edizione)

Viado, Jose. The Natural Resources Position of the Philippines. [place of publication not identified]: [publisher not identified], 1968.

Citatione MLA (9a ed.)

Viado, Jose. The Natural Resources Position of the Philippines. [publisher not identified], 1968.