Wolff, W. (1947). What is psychology: A basic survey. Grune & Stratton.
Cita Chicago Style (17a ed.)Wolff, Werner. What Is Psychology: A Basic Survey. New York: Grune & Stratton, 1947.
Cita MLA (8a ed.)Wolff, Werner. What Is Psychology: A Basic Survey. Grune & Stratton, 1947.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.