Cita APA (7a ed.)

Anonymous, [. (1950). Parallel Organum (version a). Harvard University Press.

Cita Chicago Style (17a ed.)

Anonymous, [^]. Parallel Organum (version a). [Place of publication not identified]: Harvard University Press, 1950.

Cita MLA (9a ed.)

Anonymous, [^]. Parallel Organum (version a). Harvard University Press, 1950.