Williams, G. (1967). Modern rugby: A comprehensive guide for player and coach (2nd ed.). Stanley Paul.
Citace podle Chicago (17th ed.)Williams, Gerwyn. Modern Rugby: A Comprehensive Guide for Player and Coach. 2nd ed. London: Stanley Paul, 1967.
Citace podle MLA (8th ed.)Williams, Gerwyn. Modern Rugby: A Comprehensive Guide for Player and Coach. 2nd ed. Stanley Paul, 1967.
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