APA (7th ed.) Citation

Kramer, S. N. (1981). History Begins at Sumer. Thirty-Nine Firsts in Man's Recorded History.

Chicago Style (17th ed.) Citation

Kramer, Samuel Noah. History Begins at Sumer. Thirty-Nine Firsts in Man's Recorded History. Philadelphia, 1981.

MLA (8th ed.) Citation

Kramer, Samuel Noah. History Begins at Sumer. Thirty-Nine Firsts in Man's Recorded History. 1981.