Dyfyniad APA

(1968). The World almanac and book of facts. The New World-Telegram.

Dyfyniad Arddull Chicago

The World Almanac and Book of Facts. New York: The New World-Telegram, 1968.

Dyfyniad MLA

The World Almanac and Book of Facts. The New World-Telegram, 1968.

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