APA (7th ed.) Citation

British Museum. Department of Printed Books & Thomas, H. (1940). Short-title catalogue of Portuguese books printed before 1601 now in the British Museum. Printed by order of the Trustees.

Chicago Style (17th ed.) Citation

British Museum. Department of Printed Books and Henry Thomas. Short-title Catalogue of Portuguese Books Printed Before 1601 Now in the British Museum. London: Printed by order of the Trustees, 1940.

MLA (8th ed.) Citation

British Museum. Department of Printed Books and Henry Thomas. Short-title Catalogue of Portuguese Books Printed Before 1601 Now in the British Museum. Printed by order of the Trustees, 1940.