Grun, B., & Stein, W. (1991). The timetables of history: A horizontal linkage of people and events (New 3rd rev. ed.). New York: Simon & Schuster.MLA Citation
Grun, Bernard, and Werner Stein. The Timetables of History: A Horizontal Linkage of People and Events. New 3rd rev. ed. New York: Simon & Schuster, 1991.