Ball, D. (1983). Backwards and forwards: A technical manual for reading plays. Southern Illinois University Press.
Chicago-Zitierstil (17. Ausg.)Ball, David. Backwards and Forwards: A Technical Manual for Reading Plays. Carbondale: Southern Illinois University Press, 1983.
MLA-Zitierstil (9. Ausg.)Ball, David. Backwards and Forwards: A Technical Manual for Reading Plays. Southern Illinois University Press, 1983.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.