Cita APA (7a ed.)

Ullmann, W., Linehan, P., & Tierney, B. (2012). Authority and Power: Studies on medieval law and government presented to Walter Ullmann on his 70th. birthday. University.

Cita Chicago Style (17a ed.)

Ullmann, Walter, Peter Linehan, y Brian Tierney. Authority and Power: Studies on Medieval Law and Government Presented to Walter Ullmann on His 70th. Birthday. Cambridge: University, 2012.

Cita MLA (9a ed.)

Ullmann, Walter, et al. Authority and Power: Studies on Medieval Law and Government Presented to Walter Ullmann on His 70th. Birthday. University, 2012.