APA (7th ed.) Citation

Hoffmeister, C., Richter, G., & Wenzel, W. (1985). Variable stars. Springer-Verlag.

Chicago Style (17th ed.) Citation

Hoffmeister, C., Gerold Richter, and W. Wenzel. Variable Stars. Berlin ; New York: Springer-Verlag, 1985.

MLA (8th ed.) Citation

Hoffmeister, C., et al. Variable Stars. Springer-Verlag, 1985.