WOELFEL, C. J. Budgeting Pricing & Cost Controls A Desktop Encyclopedia Charles J. Woelfel. Probus, Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWOELFEL, Charles J. Budgeting Pricing & Cost Controls A Desktop Encyclopedia Charles J. Woelfel. Probus, Publishing.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWOELFEL, Charles J. Budgeting Pricing & Cost Controls A Desktop Encyclopedia Charles J. Woelfel. Probus, Publishing.
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