Cita APA (7a ed.)

Proctor, R. G. C. (1999). An index to the early printed books in the British Museum: From the invention of printing to the year 1500. Martino Fine Books.

Cita Chicago Style (17a ed.)

Proctor, Robert George Collier. An Index to the Early Printed Books in the British Museum: From the Invention of Printing to the Year 1500. Mansfield Centre: Martino Fine Books, 1999.

Cita MLA (9a ed.)

Proctor, Robert George Collier. An Index to the Early Printed Books in the British Museum: From the Invention of Printing to the Year 1500. Martino Fine Books, 1999.