Research methods in social relations.
Kidder, Louise H,author.
Judd, Charles M.
Smith, Eliot R.
Selltiz, Claire.Selltiz, Wrightsman and Cook's Research methods in social relations.
Society for the Psychological Study of Social Issues.
Previous edition published as: Selltiz, Wrightsman and Cook's Research methods in social relations, 1981.
Bibliography: p521-548. - Includes index.
Sociology