Cita APA (7a ed.)

Robles, G. S. (1955). Engineering and architectural laws of the Philippines. [s.n.].

Cita Chicago Style (17a ed.)

Robles, Gonzalo S. Engineering and Architectural Laws of the Philippines. Manila: [s.n.], 1955.

Cita MLA (9a ed.)

Robles, Gonzalo S. Engineering and Architectural Laws of the Philippines. [s.n.], 1955.