Cita APA (7a ed.)
Walbert, M. S. (1989). Grading software programs accompanying selected principles texts. Economic Inquiry, 27, 169-179.
Cita Chicago Style (17a ed.)
Walbert, Mark S. "Grading Software Programs Accompanying Selected Principles Texts." Economic Inquiry 27 (1989): 169-179.
Cita MLA (9a ed.)
Walbert, Mark S. "Grading Software Programs Accompanying Selected Principles Texts." Economic Inquiry, vol. 27, 1989, pp. 169-179.
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