Cita APA (7a ed.)

Villanueva, E. (1993). Science and knowledge. Ridgeview.

Cita Chicago Style (17a ed.)

Villanueva, Enrique. Science and Knowledge. Atascadero, California: Ridgeview, 1993.

Cita MLA (9a ed.)

Villanueva, Enrique. Science and Knowledge. Ridgeview, 1993.