APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Hoffmeister, C., Wolfgang Wenzel, and Gerold Richter. Variable Stars. Berlin [u.a.]: Springer, 1985.

MLA (9th ed.) Citation

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