Dyfyniad APA

Day, R. A., & Underwood, A. (1991). Quantitative analysis (6th edition.). Goodwill.

Dyfyniad Arddull Chicago

Day, R. A., and A.L Underwood. Quantitative Analysis. 6th edition. Manila: Goodwill, 1991.

Dyfyniad MLA

Day, R. A., and A.L Underwood. Quantitative Analysis. 6th edition. Goodwill, 1991.

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