APA (7th ed.) Citation

Wilkinson, Hill, & Vang. (1992). Graphics. Systat Inc.

Chicago Style (17th ed.) Citation

Wilkinson, Hill, and Vang. Graphics. Evanston: Systat Inc, 1992.

MLA (9th ed.) Citation

Wilkinson, et al. Graphics. Systat Inc, 1992.

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