Cita APA (7a ed.)

Frank, P. (1961). The validation of scientific theories. Collier.

Cita Chicago Style (17a ed.)

Frank, Philipp. The Validation of Scientific Theories. New York: Collier, 1961.

Cita MLA (9a ed.)

Frank, Philipp. The Validation of Scientific Theories. Collier, 1961.