Cita APA (7a ed.)

Laer, P. H. v. (1962). Philosophy of science. Duquesne University.

Cita Chicago Style (17a ed.)

Laer, P. H. van. Philosophy of Science. Pittsburgh: Duquesne University, 1962.

Cita MLA (9a ed.)

Laer, P. H. van. Philosophy of Science. Duquesne University, 1962.