Ruch, F. L. (1959). Psychology and life (5th. ed.). Scott, Foresman.
Cita Chicago Style (17a ed.)Ruch, Floyd L. Psychology and Life. 5th. ed. Scott, Foresman, 1959.
Cita MLA (9a ed.)Ruch, Floyd L. Psychology and Life. 5th. ed. Scott, Foresman, 1959.
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