Cita APA (7th ed.)
Bernal, J. D. Science in History: The Natural Sciences in Our Time. Penguin.
Cita Chicago (17th ed.)
Bernal, John D. Science in History: The Natural Sciences in Our Time. Harmondsworth, Inglaterra: Penguin.
Cita MLA (9th ed.)
Bernal, John D. Science in History: The Natural Sciences in Our Time. Penguin.
Atenció: Aquestes cites poden no estar 100% correctes.