Clarke, D. H., & Clarke, H. H. (1970). Research processes in physical education, recreation, and health. Prentice-Hall.
Citace podle Chicago (17th ed.)Clarke, David H., a Henry Harrison Clarke. Research Processes in Physical Education, Recreation, and Health. Englewood Cliffs, N. J: Prentice-Hall, 1970.
Citace podle MLA (9th ed.)Clarke, David H., a Henry Harrison Clarke. Research Processes in Physical Education, Recreation, and Health. Prentice-Hall, 1970.
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