Anastas, J. W. (1999). Research design for social work and the human services (2nd ed.). Columbia University Press.

Anastas, Jeane W. Research Design for Social Work and the Human Services. 2nd ed. New York: Columbia University Press, 1999.

Anastas, Jeane W. Research Design for Social Work and the Human Services. 2nd ed. Columbia University Press, 1999.