Oppewal, D. (1997). Voices from the past: Reformed educators. U.P.A..
Citazione stile Chigago Style (17a edizione)Oppewal, Donald. Voices from the Past: Reformed Educators. New York: U.P.A., 1997.
Citatione MLA (9a ed.)Oppewal, Donald. Voices from the Past: Reformed Educators. U.P.A., 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.