APA način citiranja

Shapley, H. (1919). Studies of Magnitudes in Star Clusters: IX. The Distances and Distribution of Seventy Open Clusters.

Čikaški stil citiranja

Shapley, Harlow. Studies of Magnitudes in Star Clusters: IX. The Distances and Distribution of Seventy Open Clusters. 1919.

MLA način citiranja

Shapley, Harlow. Studies of Magnitudes in Star Clusters: IX. The Distances and Distribution of Seventy Open Clusters. 1919.