Não informado. (1981). Advances in Space Research. International Council of Scientific Unions, Committee on Space Research.
Chicago-referens (17:e uppl.)Não informado. Advances in Space Research. Oxford, Inglaterra: International Council of Scientific Unions, Committee on Space Research, 1981.
MLA-referens (8:e uppl.)Não informado. Advances in Space Research. International Council of Scientific Unions, Committee on Space Research, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.