Não informado. (1983). Space Communications and Broadcasting. European Space Agency.
Chicago-referens (17:e uppl.)Não informado. Space Communications and Broadcasting. Amsterdam: European Space Agency, 1983.
MLA-referens (8:e uppl.)Não informado. Space Communications and Broadcasting. European Space Agency, 1983.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.