Heyel, C. (1955). Foreman's handbook/3e (3rd ed.). Mc graw hill book company.
Chicago-stil citatHeyel, Carl. Foreman's Handbook/3e. 3rd ed. New York: Mc graw hill book company, 1955.
MLA-referensHeyel, Carl. Foreman's Handbook/3e. 3rd ed. Mc graw hill book company, 1955.
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