Παραπομπή σε μορφή APA (7η εκδ.)

Lundmark, K. E. (1920). The relations of the globular clusters and spiral nebulæ to the stellar system: An attempt to estimate their parallaxes. Almqvist & Wiksells boktryckeri-a.-b..

Παραπομπή σε μορφή Chicago (17η εκδ.)

Lundmark, Knut Emil. The Relations of the Globular Clusters and Spiral Nebulæ to the Stellar System: An Attempt to Estimate Their Parallaxes. Stockholm: Almqvist & Wiksells boktryckeri-a.-b., 1920.

Παραπομπή σε μορφή MLA (8th εκδ.)

Lundmark, Knut Emil. The Relations of the Globular Clusters and Spiral Nebulæ to the Stellar System: An Attempt to Estimate Their Parallaxes. Almqvist & Wiksells boktryckeri-a.-b., 1920.