Brubaker, O. J. (1972). Understanding people. Evangelical Teacher Training Association.
Citazione stile Chigago Style (17a edizione)Brubaker, Omar J. Understanding People. Evangelical Teacher Training Association, 1972.
Citatione MLA (9a ed.)Brubaker, Omar J. Understanding People. Evangelical Teacher Training Association, 1972.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.