APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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