Horton, R. E. (1928). Measurable outcomes of individual laboratory work in high school chemistry. Teachers college, Columbia university.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHorton, Ralph Ellison. Measurable Outcomes of Individual Laboratory Work in High School Chemistry. New York city: Teachers college, Columbia university, 1928.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHorton, Ralph Ellison. Measurable Outcomes of Individual Laboratory Work in High School Chemistry. Teachers college, Columbia university, 1928.
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