Não informado. (1983). Space Communications and Broadcasting. European Space Agency.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Space Communications and Broadcasting. Amsterdam: European Space Agency, 1983.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Space Communications and Broadcasting. European Space Agency, 1983.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.