APA (7th ed.) Citation

Kretschmer, B., & Grigoleit, U. (1992). Vieweg-Software-Trainer Excel 4.0. Vieweg.

Chicago Style (17th ed.) Citation

Kretschmer, Bernd, and Uwe Grigoleit. Vieweg-Software-Trainer Excel 4.0. Braunschweig u.a: Vieweg, 1992.

MLA (9th ed.) Citation

Kretschmer, Bernd, and Uwe Grigoleit. Vieweg-Software-Trainer Excel 4.0. Vieweg, 1992.