Cita APA (7th ed.)

Gjertsen, D. (1989). Science and philosophy: Past and present. Penguin Books.

Cita Chicago (17th ed.)

Gjertsen, Derek. Science and Philosophy: Past and Present. London: Penguin Books, 1989.

Cita MLA (9th ed.)

Gjertsen, Derek. Science and Philosophy: Past and Present. Penguin Books, 1989.