APA (7th ed.) Citation

Appenzeller, I., Lequeux, J., & Silk, J. (1980). Star formation. Geneva Observatory.

Chicago Style (17th ed.) Citation

Appenzeller, Immo, James Lequeux, and Joseph Silk. Star Formation. Sauverny: Geneva Observatory, 1980.

MLA (9th ed.) Citation

Appenzeller, Immo, et al. Star Formation. Geneva Observatory, 1980.