Tohutoro APA (7th ed.)
Spencer, N. (1985). A Text-book of business calculations. Heineman Educational Books.
Tohutoru Kātū Chicago (17th ed.)
Spencer, Norman. A Text-book of Business Calculations. Nairobi: Heineman Educational Books, 1985.
Tohutoro MLA (9th ed.)
Spencer, Norman. A Text-book of Business Calculations. Heineman Educational Books, 1985.
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