Crawford, H. E. W. (1991). Sumer and the Sumerians (1. publ.). Cambridge University Press.
Chicago Style (17th ed.) CitationCrawford, Harriet E. W. Sumer and the Sumerians. 1. publ. Cambridge [u.a.]: Cambridge University Press, 1991.
MLA (8th ed.) CitationCrawford, Harriet E. W. Sumer and the Sumerians. 1. publ. Cambridge University Press, 1991.
Warning: These citations may not always be 100% accurate.