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Dyfyniad Arddull ChicagoJoklik, Wolfgang K., and David T. Smith. Zinsser Microbiology. 15th ed. New York: Meredith Corporation, 1972.
Dyfyniad MLAJoklik, Wolfgang K., and David T. Smith. Zinsser Microbiology. 15th ed. Meredith Corporation, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.