APA aipamena

O'Brien, D. J., & Bell, A. (1980). Solving equations: A teaching experiment. [s.n.].

Chicago Style aipamena

O'Brien, Dennis J., and Alan Bell. Solving Equations: A Teaching Experiment. Nottingham: [s.n.], 1980.

MLA aipamena

O'Brien, Dennis J., and Alan Bell. Solving Equations: A Teaching Experiment. [s.n.], 1980.

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