APA (7th ed.) Citation

Hamel, J. (2006). Johannes de Sacroboscos Sphaera.

Chicago Style (17th ed.) Citation

Hamel, Jürgen. Johannes De Sacroboscos Sphaera. 2006.

MLA (9th ed.) Citation

Hamel, Jürgen. Johannes De Sacroboscos Sphaera. 2006.

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