APA (7th ed.) Citation

Tornsdorf, H., & Tornsdorf, M. (1998). Windows 98. Hanser.

Chicago Style (17th ed.) Citation

Tornsdorf, Helmut, and Manfred Tornsdorf. Windows 98. München [u.a.]: Hanser, 1998.

MLA (9th ed.) Citation

Tornsdorf, Helmut, and Manfred Tornsdorf. Windows 98. Hanser, 1998.