APA (7th ed.) Citation

Mathsoft, Inc. (1995). A gentle introduction to S-Plus: Version 3.3 for Windows. StatSci Division, MathSoft, Inc.

Chicago Style (17th ed.) Citation

Mathsoft, Inc. A Gentle Introduction to S-Plus: Version 3.3 for Windows. Seattle, Wash.: StatSci Division, MathSoft, Inc, 1995.

MLA (9th ed.) Citation

Mathsoft, Inc. A Gentle Introduction to S-Plus: Version 3.3 for Windows. StatSci Division, MathSoft, Inc, 1995.

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