APA (7th ed.) Citation

Nicholas, o. C., & Watts, P. M. (1986). De ludo globi =: The game of spheres. Abaris Books.

Chicago Style (17th ed.) Citation

Nicholas, of Cusa, and Pauline Moffitt Watts. De Ludo Globi =: The Game of Spheres. New York: Abaris Books, 1986.

MLA (9th ed.) Citation

Nicholas, of Cusa, and Pauline Moffitt Watts. De Ludo Globi =: The Game of Spheres. Abaris Books, 1986.