Dyfyniad APA

Clarke, A. C., Dubos, R., Margenau, H., & Snow, C. (1974). Man and space. Time-Life Books.

Dyfyniad Arddull Chicago

Clarke, Arthur C., Rene Dubos, Henry Margenau, and C.P Snow. Man and Space. Alexandria, Va: Time-Life Books, 1974.

Dyfyniad MLA

Clarke, Arthur C., et al. Man and Space. Time-Life Books, 1974.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.