(1984). National Longitudinal Study of the Class of 1972 United States Department of Education. Center for Education Statistics. [electronic resource].
Cita Chicago (17th ed.)National Longitudinal Study of the Class of 1972 United States Department of Education. Center for Education Statistics. [electronic Resource]. 1984.
Cita MLA (9th ed.)National Longitudinal Study of the Class of 1972 United States Department of Education. Center for Education Statistics. [electronic Resource]. 1984.
Atenció: Aquestes cites poden no estar 100% correctes.