Postgate, J. (1975). Microbes and man. Penguin.
Cita Chicago (17th ed.)Postgate, John. Microbes and Man. Harmondsworth: Penguin, 1975.
Cita MLA (9th ed.)Postgate, John. Microbes and Man. Penguin, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.