APA (7th ed.) Citation

Berg, R. M., & Fredrick, L. W. (1978). Descriptive astronomy. Van Nostrand.

Chicago Style (17th ed.) Citation

Berg, Rebecca M., and Laurence W. Fredrick. Descriptive Astronomy. New York, NY [u.a.]: Van Nostrand, 1978.

MLA (9th ed.) Citation

Berg, Rebecca M., and Laurence W. Fredrick. Descriptive Astronomy. Van Nostrand, 1978.