Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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