Dyfyniad APA

Stiwell, J. A., & Lipsey, R. G. (1971). Workbook to Accompany: An Instroduction to Positive Economics (2nd ed.). English Language Book Society.

Dyfyniad Arddull Chicago

Stiwell, J A., and Richard G. Lipsey. Workbook to Accompany: An Instroduction to Positive Economics. 2nd ed. London: English Language Book Society, 1971.

Dyfyniad MLA

Stiwell, J A., and Richard G. Lipsey. Workbook to Accompany: An Instroduction to Positive Economics. 2nd ed. English Language Book Society, 1971.

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