Cita APA (7a ed.)

Bacon, R. (1900). The Opus Majus of Roger Bacon. Williams and Norgate.

Cita Chicago Style (17a ed.)

Bacon, Roger. The Opus Majus of Roger Bacon. London ; Edinburg ; Oxford: Williams and Norgate, 1900.

Cita MLA (9a ed.)

Bacon, Roger. The Opus Majus of Roger Bacon. Williams and Norgate, 1900.