Dyfyniad APA

(1966). Smithsonian Treasury of 20th-Century Science. New York: Simon and Schuster.

Dyfyniad Arddull Chicago

Smithsonian Treasury of 20th-Century Science. New York: Simon and Schuster, 1966.

Dyfyniad MLA

Smithsonian Treasury of 20th-Century Science. New York: Simon and Schuster, 1966.

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