Postgate, J. (1979). Microbes and man. New York: Penguin Books.
Dyfyniad Arddull ChicagoPostgate, John. Microbes and Man. New York: Penguin Books, 1979.
Dyfyniad MLAPostgate, John. Microbes and Man. New York: Penguin Books, 1979.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.