Gaya APA

Kingdon, R, M., Friedman, J. (1987). Regnum, Religio et Ratio : Essays presented by Robert M. Kingdon . USA: Sixteenth Century Journal Publishers.

Gaya MLA

Kingdon, Robert, M.., Friedman, Jerome. "Regnum, Religio et Ratio : Essays presented by Robert M. Kingdon". USA: Sixteenth Century Journal Publishers, 1987. Academic.