Kramer, S. N. (1956). From the tablets of Sumer: Twenty-five firsts in man's recorded history. The Falcon's Wing Press.
Cita Chicago Style (17a ed.)Kramer, Samuel Noah. From the Tablets of Sumer: Twenty-five Firsts in Man's Recorded History. Indian Hills, Colorado: The Falcon's Wing Press, 1956.
Cita MLA (9a ed.)Kramer, Samuel Noah. From the Tablets of Sumer: Twenty-five Firsts in Man's Recorded History. The Falcon's Wing Press, 1956.
Precaución: Estas citas no son 100% exactas.