Linearity Tester: A BASIC Program for Detecting Departures from Linearity in Correlations/Roger B. Trent,West Virginia University

Blalock, Hubert M., Jr. Social Statistics New York: McGraw-Hill, 1979.

Loether, Herman J. , and Donald G. McTavish. Descriptive Statistics for Sociologists Boston: Allyn and Bacon, 1974.

SPSS, Inc. SPSSx User's Guide New York: McGraw-Hill, 1983.

Trent, Roger B. , Nancy Stout-Wiegand , and Paul M. Furbee. "The Nature of the Connection between Life Course and Satisfaction with Commumty Services." Social Indicators Research 15(Winter 1984): 417-429.