APA (7th ed.) Citation

Johannes de Sacrobosco. (1518). Sphera mundi.

Chicago Style (17th ed.) Citation

Johannes de Sacrobosco. Sphera Mundi. [Venetia], 1518.

MLA (9th ed.) Citation

Johannes de Sacrobosco. Sphera Mundi. 1518.

Warning: These citations may not always be 100% accurate.