Dyfyniad APA

(2003). National Household Education Survey, 1999 United States Department of Education. National Center for Education Statistics. [electronic resource].

Dyfyniad Arddull Chicago

National Household Education Survey, 1999 United States Department of Education. National Center for Education Statistics. [electronic Resource]. 2003.

Dyfyniad MLA

National Household Education Survey, 1999 United States Department of Education. National Center for Education Statistics. [electronic Resource]. 2003.

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