Não informado. (1976). Essence. York University, Atkinson College, Department of Psychology.
Style de citation Chicago (17e éd.)Não informado. Essence. Ontario, Canada: York University, Atkinson College, Department of Psychology, 1976.
Style de citation MLA (8e éd.)Não informado. Essence. York University, Atkinson College, Department of Psychology, 1976.
Attention : ces citations peuvent ne pas être correctes à 100%.