APA (7th ed.) Citation

Brown, R. A. (1973). Origins of English feudalism / (by) R. Allen Brown. Allen and Unwin.

Chicago Style (17th ed.) Citation

Brown, R. Allen. Origins of English Feudalism / (by) R. Allen Brown. London: Allen and Unwin, 1973.

MLA (9th ed.) Citation

Brown, R. Allen. Origins of English Feudalism / (by) R. Allen Brown. Allen and Unwin, 1973.

Warning: These citations may not always be 100% accurate.