Eckhardt, K. W. (1977). Instructor's manual for social research methods: Perspective, theory, and analysis. Random House, Inc.
Dyfyniad Arddull ChicagoEckhardt, Kenneth W. Instructor's Manual for Social Research Methods: Perspective, Theory, and Analysis. New York: Random House, Inc, 1977.
Dyfyniad MLAEckhardt, Kenneth W. Instructor's Manual for Social Research Methods: Perspective, Theory, and Analysis. Random House, Inc, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.