APA (7th ed.) Citation

(1996). The Electronic business letter writer (Version 1.0, Single-User.). [Cornelsen u.a.].

Chicago Style (17th ed.) Citation

The Electronic Business Letter Writer. Version 1.0, Single-User. [Berlin]: [Cornelsen u.a.], 1996.

MLA (9th ed.) Citation

The Electronic Business Letter Writer. Version 1.0, Single-User. [Cornelsen u.a.], 1996.