APA (7th ed.) Citation

Schmitt, H. H., & Scheer, T. S. (2005). Helios.

Chicago Style (17th ed.) Citation

Schmitt, Hatto H., and Tanja Susanne Scheer. Helios. 2005.

MLA (9th ed.) Citation

Schmitt, Hatto H., and Tanja Susanne Scheer. Helios. 2005.

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