Cita APA (7a ed.)

Duff, E. G. (1893). Early Printed Books. Kegan Paul, Trench, Trubner and Co.

Cita Chicago Style (17a ed.)

Duff, E. Gordon. Early Printed Books. London: Kegan Paul, Trench, Trubner and Co, 1893.

Cita MLA (9a ed.)

Duff, E. Gordon. Early Printed Books. Kegan Paul, Trench, Trubner and Co, 1893.