APA引文
Crawford, H. E. W. (1991). Sumer and the Sumerians. Cambridge University Press.
Chicago Style (17th ed.) Citation
Crawford, Harriet E. W. Sumer and the Sumerians. Cambridge ; New York: Cambridge University Press, 1991.
MLA引文
Crawford, Harriet E. W. Sumer and the Sumerians. Cambridge University Press, 1991.
警告：這些引文格式不一定是100％准確.