Cita APA

Bernal, J. D. (1969). Science in history. Penguin.

Citación estilo Chicago

Bernal, John Desmond. Science in History. Harmondsworth: Penguin, 1969.

Cita MLA

Bernal, John Desmond. Science in History. Penguin, 1969.

Warning: These citations may not always be 100% accurate.