APA (7th ed.) Citation

De Boor, C. (1990). Spline toolbox for use with MATLAB: User's guide. The MathWorks.

Chicago Style (17th ed.) Citation

De Boor, Carl. Spline Toolbox for Use with MATLAB: User's Guide. Mass: The MathWorks, 1990.

MLA (9th ed.) Citation

De Boor, Carl. Spline Toolbox for Use with MATLAB: User's Guide. The MathWorks, 1990.