Dyfyniad APA

National Geographic. (2006). Soccer unites the world. National Geographic Society.

Dyfyniad Arddull Chicago

National Geographic. Soccer Unites the World. Washington, DC: National Geographic Society, 2006.

Dyfyniad MLA

National Geographic. Soccer Unites the World. National Geographic Society, 2006.

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