APA (7th ed.) Citation

Wavefunction & Q-Chem. (2006). Spartan '06 for windows and linux: Tutorial and users guide. Wavefunction, Inc.

Chicago Style (17th ed.) Citation

Wavefunction and Q-Chem. Spartan '06 for Windows and Linux: Tutorial and Users Guide. Irvine, CA: Wavefunction, Inc, 2006.

MLA (9th ed.) Citation

Wavefunction and Q-Chem. Spartan '06 for Windows and Linux: Tutorial and Users Guide. Wavefunction, Inc, 2006.