APA (7th ed.) Citation

Helwig, J. T. (1978). SAS introductory guide. Releigh, N.C. : SAS Institute, Cop.

Chicago Style (17th ed.) Citation

Helwig, Jane T. SAS Introductory Guide. Releigh, N.C. : SAS Institute, Cop, 1978.

MLA (9th ed.) Citation

Helwig, Jane T. SAS Introductory Guide. Releigh, N.C. : SAS Institute, Cop, 1978.

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