Landis, J. R. (1969). Current perspectives on social problems (2. ed.). Wadsworth.
Cita Chicago Style (17a ed.)Landis, Judson R. Current Perspectives on Social Problems. 2. ed. Belmont, Calif: Wadsworth, 1969.
Cita MLA (9a ed.)Landis, Judson R. Current Perspectives on Social Problems. 2. ed. Wadsworth, 1969.
Precaución: Estas citas no son 100% exactas.