APA (7th ed.) Citation

Appenzeller, I. (2013). Introduction to astronomical spectroscopy. Cambridge observing handbooks for research astronomers.

Chicago Style (17th ed.) Citation

Appenzeller, Immo. "Introduction to Astronomical Spectroscopy." Cambridge Observing Handbooks for Research Astronomers 2013.

MLA (9th ed.) Citation

Appenzeller, Immo. "Introduction to Astronomical Spectroscopy." Cambridge Observing Handbooks for Research Astronomers, 2013.

Warning: These citations may not always be 100% accurate.