Kramer, S. N. (1981). History begins at Sumer: Thirty-nine firsts in man's recorded history (3rd rev. ed.). Philadelphia: University of Pennsylvania Press.
Chicago Style CitationKramer, Samuel Noah. History Begins At Sumer: Thirty-nine Firsts in Man's Recorded History. 3rd rev. ed. Philadelphia: University of Pennsylvania Press, 1981.
MLA CitationKramer, Samuel Noah. History Begins At Sumer: Thirty-nine Firsts in Man's Recorded History. 3rd rev. ed. Philadelphia: University of Pennsylvania Press, 1981.
Warning: These citations may not always be 100% accurate.