APA (7th ed.) Citation

Velasco, J. R., & De Guzman, E. V. (1962). Outlines of general botany.

Chicago Style (17th ed.) Citation

Velasco, J. R., and E. V. De Guzman. Outlines of General Botany. Los Banos, Laguna, De Guzman, E.V, 1962.

MLA (9th ed.) Citation

Velasco, J. R., and E. V. De Guzman. Outlines of General Botany. 1962.