Clegg, R., & Thompson, W. A. (1974). Modern sports officiating: A practical guide (4th.ed.). Brown.
Tohutoru Kātū Chicago (17th ed.)Clegg, Richard, me William A. Thompson. Modern Sports Officiating: A Practical Guide. 4th.ed. Dubuque: Brown, 1974.
Tohutoro MLA (9th ed.)Clegg, Richard, me William A. Thompson. Modern Sports Officiating: A Practical Guide. 4th.ed. Brown, 1974.
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