Arrupe, P., & Harriott, J. (1977). A planet to heal: Reflections and forecasts (2d ed.). International Center for Jesuit Education.
Chicago (17e ed.) BronvermeldingArrupe, Pedro, en John Harriott. A Planet to Heal: Reflections and Forecasts. 2d ed. Rome: International Center for Jesuit Education, 1977.
MLA (8e ed.) BronvermeldingArrupe, Pedro, en John Harriott. A Planet to Heal: Reflections and Forecasts. 2d ed. International Center for Jesuit Education, 1977.
Let op: Deze citaties zijn niet altijd 100% accuraat.