APA (7th ed.) Citation

B.H. Blackwell Ltd & B.H. Blackwell Ltd. (1973). The Powys family and their books: With a selection of other rare modern books. B.H. Blackwood Ltd..

Chicago Style (17th ed.) Citation

B.H. Blackwell Ltd and B.H. Blackwell Ltd. The Powys Family and Their Books: With a Selection of Other Rare Modern Books. Oxford: B.H. Blackwood Ltd., 1973.

MLA (9th ed.) Citation

B.H. Blackwell Ltd and B.H. Blackwell Ltd. The Powys Family and Their Books: With a Selection of Other Rare Modern Books. B.H. Blackwood Ltd., 1973.