sack, K., & linsel, h. (1966). planning of technical progress in socialist countries: Planning of research and development. the institute of national planning.
Chicago-viite (17. p.)sack, K., ja hermann linsel. Planning of Technical Progress in Socialist Countries: Planning of Research and Development. cairo: the institute of national planning, 1966.
MLA-viite (9. p.)sack, K., ja hermann linsel. Planning of Technical Progress in Socialist Countries: Planning of Research and Development. the institute of national planning, 1966.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.