Hefley, J. C. (1968). Peril by choice: The story of John and Elaine Beekman, Wycliffe Bible translators in Mexico (Special ed.). School of Tomorrow.
Citazione stile Chigago Style (17a edizione)Hefley, James C. Peril by Choice: The Story of John and Elaine Beekman, Wycliffe Bible Translators in Mexico. Special ed. Lewisville, Texas: School of Tomorrow, 1968.
Citatione MLA (8a ed.)Hefley, James C. Peril by Choice: The Story of John and Elaine Beekman, Wycliffe Bible Translators in Mexico. Special ed. School of Tomorrow, 1968.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.