Spear, V. I. (1988). Sports illustrated racquetball: Strategies for winning. Sports Illustrated.
Chicago-viite (17. p.)Spear, Victor I. Sports Illustrated Racquetball: Strategies for Winning. New York: Sports Illustrated, 1988.
MLA-viite (9. p.)Spear, Victor I. Sports Illustrated Racquetball: Strategies for Winning. Sports Illustrated, 1988.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.