APA (7th ed.) Citation

(1990). Microsoft Windows version 3.1: Getting started with Microsoft Windows. Microsoft.

Chicago Style (17th ed.) Citation

Microsoft Windows Version 3.1: Getting Started with Microsoft Windows. Redmond, Wash: Microsoft, 1990.

MLA (9th ed.) Citation

Microsoft Windows Version 3.1: Getting Started with Microsoft Windows. Microsoft, 1990.

Warning: These citations may not always be 100% accurate.