Teggart, F. J., & Bock, K. (1977). Theory and processes of history (Second pbk. edition.). University of California Press.
Cita Chicago (17th ed.)Teggart, Frederick J., i Kenneth Bock. Theory and Processes of History. Second pbk. edition. Berkeley: University of California Press, 1977.
Cita MLA (8th ed.)Teggart, Frederick J., i Kenneth Bock. Theory and Processes of History. Second pbk. edition. University of California Press, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.