Ball, D. (2017). Backwards and forwards: A technical manual for reading plays. Southern Illinois University Press.
Cita Chicago (17th ed.)Ball, David. Backwards and Forwards: A Technical Manual for Reading Plays. Carbondale: Southern Illinois University Press, 2017.
Cita MLA (9th ed.)Ball, David. Backwards and Forwards: A Technical Manual for Reading Plays. Southern Illinois University Press, 2017.
Atenció: Aquestes cites poden no estar 100% correctes.