APA (7th ed.) Zitazioa

Sachs , I. (1964). Planning and Economic Development. PWN.

Chicago Style (17th ed.) Zitazioa

Sachs , Ignacy. Planning and Economic Development. Warsaw: PWN, 1964.

MLA (9th ed.) Zitazioa

Sachs , Ignacy. Planning and Economic Development. PWN, 1964.

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