APA

Combs S. B., Zirbel J. H., . (1999). Fundamentals of AutoCAD release 14. Upper Saddle River, N.J: Prentice Hall.

Chicago

Combs Steven B, Zirbel Jay H, . 1999. Fundamentals of AutoCAD release 14. Upper Saddle River, N.J: Prentice Hall.

Harvard

Combs S. B., Zirbel J. H., . (1999). Fundamentals of AutoCAD release 14. Upper Saddle River, N.J: Prentice Hall.

MLA

Combs Steven B, Zirbel Jay H, . Fundamentals of AutoCAD release 14. Upper Saddle River, N.J: Prentice Hall. 1999.