Silverberg, R. (1963). Lost cities and vanished civilizations (Bantam pathfinder edition.). New York: Bantam Books.
استشهاد بنمط شيكاغوSilverberg, Robert. Lost Cities and Vanished Civilizations. Bantam pathfinder edition. New York: Bantam Books, 1963.
MLA استشهادSilverberg, Robert. Lost Cities and Vanished Civilizations. Bantam pathfinder edition. New York: Bantam Books, 1963.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.