Dyfyniad APA

Crowther, J. G. (1966). Discoveries and inventions of the 20th century. London: Routledge & K. Paul.

Dyfyniad Arddull Chicago

Crowther, J. G. Discoveries and Inventions of the 20th Century. London: Routledge & K. Paul, 1966.

Dyfyniad MLA

Crowther, J. G. Discoveries and Inventions of the 20th Century. London: Routledge & K. Paul, 1966.

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