Dyfyniad APA

Sarah Janssen. (2008). The WORLD almanac and book of facts 2008. World Almanac Books.

Dyfyniad Arddull Chicago

Sarah Janssen. The WORLD Almanac and Book of Facts 2008. World Almanac Books, 2008.

Dyfyniad MLA

Sarah Janssen. The WORLD Almanac and Book of Facts 2008. World Almanac Books, 2008.

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