APA (7th ed.) Citation

Johannes de Sacrobosco. (1559). Sphaera Ioannis de Sacrobosco. Richardus.

Chicago Style (17th ed.) Citation

Johannes de Sacrobosco. Sphaera Ioannis De Sacrobosco. Antverpiae: Richardus, 1559.

MLA (9th ed.) Citation

Johannes de Sacrobosco. Sphaera Ioannis De Sacrobosco. Richardus, 1559.

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