Johnson, B. L., & Nelson, J. K. (1974). Practical measurements for evaluation in physical education (2d ed.). Burgess Pub. Co.
Lua i Stíl Chicago (17ú heag.)Johnson, Barry L., agus Jack K. Nelson. Practical Measurements for Evaluation in Physical Education. 2d ed. Minneapolis,: Burgess Pub. Co, 1974.
Lua MLA (8ú heag.)Johnson, Barry L., agus Jack K. Nelson. Practical Measurements for Evaluation in Physical Education. 2d ed. Burgess Pub. Co, 1974.
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