Não informado. (1969). Bulletin of the American Astronomical Society. American Institute of Physics.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Bulletin of the American Astronomical Society. New York: American Institute of Physics, 1969.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Bulletin of the American Astronomical Society. American Institute of Physics, 1969.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.