Manalac, G. S. (1978). Vision of tomorrow. Mansons Pub. House.
Cita Chicago Style (17a ed.)Manalac, Gaudencio S. Vision of Tomorrow. San Juan, Metro Manila: Mansons Pub. House, 1978.
Cita MLA (9a ed.)Manalac, Gaudencio S. Vision of Tomorrow. Mansons Pub. House, 1978.
Precaución: Estas citas no son 100% exactas.