Não informado. (1926). Annals of the Observatory of Lund. Observatory of Lund.
Chicago-viite (17. p.)Não informado. Annals of the Observatory of Lund. Lund, Suecia: Observatory of Lund, 1926.
MLA-viite (8. p.)Não informado. Annals of the Observatory of Lund. Observatory of Lund, 1926.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.