Παραπομπή APA

Lewis, J. P. (1969). An introduction to mathematics: For students of economics (2nd ed.). London: Macmillan.

Παραπομπή Chicago Style

Lewis, J. Parry. An Introduction to Mathematics: For Students of Economics. 2nd ed. London: Macmillan, 1969.

Παραπομπή MLA

Lewis, J. Parry. An Introduction to Mathematics: For Students of Economics. 2nd ed. London: Macmillan, 1969.

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