Dyfyniad APA

(2007). National Longitudinal Survey of Youth, 1979 Ohio State University. Center for Human ResourceResearch. [electronic resource].

Dyfyniad Arddull Chicago

National Longitudinal Survey of Youth, 1979 Ohio State University. Center for Human ResourceResearch. [electronic Resource]. 2007.

Dyfyniad MLA

National Longitudinal Survey of Youth, 1979 Ohio State University. Center for Human ResourceResearch. [electronic Resource]. 2007.

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