Willson, J. D. (1989). Budgeting and profit planning manual (2nd ed.). Warren, Gorham & Lamont, Inc..
Tohutoru Kātū Chicago (17th ed.)Willson, James D. Budgeting and Profit Planning Manual. 2nd ed. Boston: Warren, Gorham & Lamont, Inc., 1989.
Tohutoro MLA (9th ed.)Willson, James D. Budgeting and Profit Planning Manual. 2nd ed. Warren, Gorham & Lamont, Inc., 1989.
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