Παραπομπή APA

Harper, W. (1977). Statistics (3rd edition.). Esatover: Macdonald and Evans.

Παραπομπή Chicago Style

Harper, W.M. Statistics. 3rd edition. Esatover: Macdonald and Evans, 1977.

Παραπομπή MLA

Harper, W.M. Statistics. 3rd edition. Esatover: Macdonald and Evans, 1977.

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