Não informado. (1969). Bulletin of the American Astronomical Society. American Institute of Physics.
Chicago-viite (17. p.)Não informado. Bulletin of the American Astronomical Society. New York: American Institute of Physics, 1969.
MLA-viite (8. p.)Não informado. Bulletin of the American Astronomical Society. American Institute of Physics, 1969.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.