APA引文

Shapley, H. (1916). Studies of Magnitudes in Star Clusters: II. On the Sequence of Spectral Types in Stellar Evolution.

Citação norma Chicago

Shapley, Harlow. Studies of Magnitudes in Star Clusters: II. On the Sequence of Spectral Types in Stellar Evolution. 1916.

MLA引文

Shapley, Harlow. Studies of Magnitudes in Star Clusters: II. On the Sequence of Spectral Types in Stellar Evolution. 1916.

警告：這些引文格式不一定是100％准確.