Παραπομπή APA

Ochs, R., & Gray, J. (1975). Student's workbook for contemporary business mathematics. Philadelphia: W. B. Saunders.

Παραπομπή Chicago Style

Ochs, Robert, and James Gray. Student's Workbook for Contemporary Business Mathematics. Philadelphia: W. B. Saunders, 1975.

Παραπομπή MLA

Ochs, Robert, and James Gray. Student's Workbook for Contemporary Business Mathematics. Philadelphia: W. B. Saunders, 1975.

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