APA Citation

Sterne, T. E., & Campbell, L. (1937). Changes of Period in Variable Stars of Long Period.

Chicago Style Citation

Sterne, T. E., and L. Campbell. Changes of Period in Variable Stars of Long Period. 1937.

MLA Citation

Sterne, T. E., and L. Campbell. Changes of Period in Variable Stars of Long Period. 1937.

Warning: These citations may not always be 100% accurate.