Não informado. (1936). Sky: Magazine of cosmic news. Amateur Astronomers Association.
Chicago-viite (17. p.)Não informado. Sky: Magazine of Cosmic News. New York: Amateur Astronomers Association, 1936.
MLA-viite (8. p.)Não informado. Sky: Magazine of Cosmic News. Amateur Astronomers Association, 1936.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.