Davis, C. O. (1914). A guide to methods and observation in history; studies in high school observation. Chicago.
Chicagoスタイル(17版)引用形式Davis, Calvin Olin. A Guide to Methods and Observation in History; Studies in High School Observation. New York: Chicago, 1914.
MLA(9版)引用形式Davis, Calvin Olin. A Guide to Methods and Observation in History; Studies in High School Observation. Chicago, 1914.
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