Cita APA (7a ed.)

Stroll, M. (1991). Symbols as power: The papacy following the investiture contest. Brill.

Cita Chicago Style (17a ed.)

Stroll, Mary. Symbols as Power: The Papacy Following the Investiture Contest. Leiden [etc.]: Brill, 1991.

Cita MLA (9a ed.)

Stroll, Mary. Symbols as Power: The Papacy Following the Investiture Contest. Brill, 1991.