APA (7th ed.) Citation

Proctor, R. G. C. (1966). The printing of Greek in the fifteenth century. G. Olms.

Chicago Style (17th ed.) Citation

Proctor, Robert George Collier. The Printing of Greek in the Fifteenth Century. Hildesheim: G. Olms, 1966.

MLA (8th ed.) Citation

Proctor, Robert George Collier. The Printing of Greek in the Fifteenth Century. G. Olms, 1966.