APA (7th ed.) Citation

Spector, P. (1994). An introduction to S and S-plus / Phil Spector. Duxbury Press.

Chicago Style (17th ed.) Citation

Spector, Phil. An Introduction to S and S-plus / Phil Spector. Belmont,Calif: Duxbury Press, 1994.

MLA (9th ed.) Citation

Spector, Phil. An Introduction to S and S-plus / Phil Spector. Duxbury Press, 1994.

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