linsel, h., & sack, k. (1965). classification of national econom. the institute of national planning.
Lua i Stíl Chicago (17ú heag.)linsel, hermann, agus kurt sack. Classification of National Econom. cairo: the institute of national planning, 1965.
Lua MLA (9ú heag.)linsel, hermann, agus kurt sack. Classification of National Econom. the institute of national planning, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.