APA (7th ed.) Citation

Schilt, J. (1938). Contributions from the Rutherfurd Observatory of Columbia University: No. 31 Photographic magnitudes of 7280 stars in the zone +50 to +55. Columbia University Press.

Chicago Style (17th ed.) Citation

Schilt, J. Contributions from the Rutherfurd Observatory of Columbia University: No. 31 Photographic Magnitudes of 7280 Stars in the Zone +50 to +55. New York: Columbia University Press, 1938.

MLA (9th ed.) Citation

Schilt, J. Contributions from the Rutherfurd Observatory of Columbia University: No. 31 Photographic Magnitudes of 7280 Stars in the Zone +50 to +55. Columbia University Press, 1938.