Kramer S.N. (1981). History begins art Sumer: Thirty-nine firsts in man's recorded history. The University of Pennsylvania Press.
Цитирование в стиле Чикаго (17-е изд.)Kramer S.N. History Begins Art Sumer: Thirty-nine Firsts in Man's Recorded History. Philadelphia: The University of Pennsylvania Press, 1981.
Цитирование MLA (8-е изд.)Kramer S.N. History Begins Art Sumer: Thirty-nine Firsts in Man's Recorded History. The University of Pennsylvania Press, 1981.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.