APA (7th ed.) Citation

Schilt, J. (1937). Contributions from the Rutherfurd Observatory of Columbia University: No. 30 Photographic magnitudes of 6902 stars in the zone +55 to +60. Columbia University Press.

Chicago Style (17th ed.) Citation

Schilt, J. Contributions from the Rutherfurd Observatory of Columbia University: No. 30 Photographic Magnitudes of 6902 Stars in the Zone +55 to +60. New York: Columbia University Press, 1937.

MLA (9th ed.) Citation

Schilt, J. Contributions from the Rutherfurd Observatory of Columbia University: No. 30 Photographic Magnitudes of 6902 Stars in the Zone +55 to +60. Columbia University Press, 1937.