Kramer, S. N. (1981). History Begins at Sumer. Thirty-Nine Firsts in Man's Recorded History.
Chicago-Zitierstil (17. Ausg.)Kramer, Samuel Noah. History Begins at Sumer. Thirty-Nine Firsts in Man's Recorded History. Philadelphia, 1981.
MLA-Zitierstil (8. Ausg.)Kramer, Samuel Noah. History Begins at Sumer. Thirty-Nine Firsts in Man's Recorded History. 1981.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.