Ruhrberg, K., Schneckenburger, M., & Walther, I. F. (2005). Art of the 20th century (25th anniversary ed.). Keoln ; London: Taschen.
Чикагска система за цитиранеRuhrberg, Karl., Manfred Schneckenburger, и Ingo F. Walther. Art of the 20th Century. 25th anniversary ed. Keoln ; London: Taschen, 2005.
MLA формат за цитиранеRuhrberg, Karl., Manfred Schneckenburger, и Ingo F. Walther. Art of the 20th Century. 25th anniversary ed. Keoln ; London: Taschen, 2005.
Внимание: Тези цитати може да не са 100% точни.