Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.