Dyfyniad APA

Bernal, J. D. (1969). Science in history: V3. the natural sciences in our time (3rd ed.). Penguin.

Dyfyniad Arddull Chicago

Bernal, J. D. Science in History: V3. the Natural Sciences in Our Time. 3rd ed. Middlesex: Penguin, 1969.

Dyfyniad MLA

Bernal, J. D. Science in History: V3. the Natural Sciences in Our Time. 3rd ed. Penguin, 1969.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.