APA (7th ed.) Citation

Hergert, D. (1993). Understanding 1-2-3 release 4 for windows (2nd. ed.). Tech Publications.

Chicago Style (17th ed.) Citation

Hergert, Douglas. Understanding 1-2-3 Release 4 for Windows. 2nd. ed. Singapore: Tech Publications, 1993.

MLA (9th ed.) Citation

Hergert, Douglas. Understanding 1-2-3 Release 4 for Windows. 2nd. ed. Tech Publications, 1993.