Allen, G. (1978). Life science in the twentieth century. London: Cambridge University Press.
Dyfyniad Arddull ChicagoAllen, Garland. Life Science in the Twentieth Century. London: Cambridge University Press, 1978.
Dyfyniad MLAAllen, Garland. Life Science in the Twentieth Century. London: Cambridge University Press, 1978.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.