APA (7th ed.) Citation

Stephenson, C. (1960). Mediaeval feudalism (4th. print.). Great Seal Books.

Chicago Style (17th ed.) Citation

Stephenson, Carl. Mediaeval Feudalism. 4th. print. Ithaca: Great Seal Books, 1960.

MLA (9th ed.) Citation

Stephenson, Carl. Mediaeval Feudalism. 4th. print. Great Seal Books, 1960.

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