Wheatley, G. M., & Hallock, G. T. (1956). Health observation of school children: A guide for helping teachers and others to observe and understand the school child in health and illness. McGraw-Hill.
Cytowanie według stylu Chicago (wyd. 17)Wheatley, George Milholland, i Grace T. Hallock. Health Observation of School Children: A Guide for Helping Teachers and Others to Observe and Understand the School Child in Health and Illness. New York: McGraw-Hill, 1956.
Cytowanie według stylu MLA (wyd. 9)Wheatley, George Milholland, i Grace T. Hallock. Health Observation of School Children: A Guide for Helping Teachers and Others to Observe and Understand the School Child in Health and Illness. McGraw-Hill, 1956.
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