sack, K., & linsel, h. (1966). planning of technical progress in socialist countries: Planning of research and development. the institute of national planning.
Chicago-referens (17:e uppl.)sack, K., och hermann linsel. Planning of Technical Progress in Socialist Countries: Planning of Research and Development. cairo: the institute of national planning, 1966.
MLA-referens (9:e uppl.)sack, K., och hermann linsel. Planning of Technical Progress in Socialist Countries: Planning of Research and Development. the institute of national planning, 1966.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.