sack, k., & linsel, h. (1966). general organization of planning of industry (ed. 2.). National Planning Institute.
Lua i Stíl Chicago (17ú heag.)sack, kurt, agus hermann linsel. General Organization of Planning of Industry. ed. 2. cairo: National Planning Institute, 1966.
Lua MLA (9ú heag.)sack, kurt, agus hermann linsel. General Organization of Planning of Industry. ed. 2. National Planning Institute, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.