Cita APA (7th ed.)

Olbes, R. R. (2000). The Philippines: A century hence. Rene Olbes and Associates.

Cita Chicago (17th ed.)

Olbes, Rene R. The Philippines: A Century Hence. Makati City: Rene Olbes and Associates, 2000.

Cita MLA (9th ed.)

Olbes, Rene R. The Philippines: A Century Hence. Rene Olbes and Associates, 2000.