Cita APA (7a ed.)
Proctor, R. (1898). An Index to the early printed books in the British Museum.
Cita Chicago Style (17a ed.)
Proctor, Robert. An Index to the Early Printed Books in the British Museum. London, 1898.
Cita MLA (9a ed.)
Proctor, Robert. An Index to the Early Printed Books in the British Museum. 1898.
Precaución: Estas citas no son 100% exactas.