Ruch, F. L. (1959). Psychology and life (5th. ed.). Scott, Foresman.
Cita Chicago (17th ed.)Ruch, Floyd L. Psychology and Life. 5th. ed. Scott, Foresman, 1959.
Cita MLA (9th ed.)Ruch, Floyd L. Psychology and Life. 5th. ed. Scott, Foresman, 1959.
Atenció: Aquestes cites poden no estar 100% correctes.