APA (7th ed.) Citation

Barker, P., & Goldstein, B. R. (2003). Patronage and the production of "De Revolutionibus".

Chicago Style (17th ed.) Citation

Barker, Peter, and Bernard R. Goldstein. Patronage and the Production of "De Revolutionibus". 2003.

MLA (9th ed.) Citation

Barker, Peter, and Bernard R. Goldstein. Patronage and the Production of "De Revolutionibus". 2003.

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