Dyfyniad APA

CROCKETT, J. U. (1978). Bulbs James Underwood Crockett. Time Life Books.

Dyfyniad Arddull Chicago

CROCKETT, James Underwood. Bulbs James Underwood Crockett. Time Life Books, 1978.

Dyfyniad MLA

CROCKETT, James Underwood. Bulbs James Underwood Crockett. Time Life Books, 1978.

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