Dyfyniad APA

Dull, C. E. (1925). High school chemistry. H. Holt and company.

Dyfyniad Arddull Chicago

Dull, Charles E. High School Chemistry. New York: H. Holt and company, 1925.

Dyfyniad MLA

Dull, Charles E. High School Chemistry. H. Holt and company, 1925.

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