Kruif, P. d. (1940). Microbe hunters. Pocket Books.
Cita Chicago (17th ed.)Kruif, Paul de. Microbe Hunters. Nueva York: Pocket Books, 1940.
Cita MLA (9th ed.)Kruif, Paul de. Microbe Hunters. Pocket Books, 1940.
Atenció: Aquestes cites poden no estar 100% correctes.