Cita APA (7th ed.)
Wallenquist, Å. (1936). A photometric Research on the galactic cluster Messier 11. (N.G.C. 6705.).
Cita Chicago (17th ed.)
Wallenquist, Åke. A Photometric Research on the Galactic Cluster Messier 11. (N.G.C. 6705.). Uppsala, 1936.
Cita MLA (9th ed.)
Wallenquist, Åke. A Photometric Research on the Galactic Cluster Messier 11. (N.G.C. 6705.). 1936.
Atenció: Aquestes cites poden no estar 100% correctes.