APA-viite (7. p.)

Willers, F. A., & Beyer, R. T. t. (1948). Practical analysis: Graphical and numerical methods. Dover Publications.

Chicago-viite (17. p.)

Willers, Friedrich Adolf, ja Robert Thomas tr Beyer. Practical Analysis: Graphical and Numerical Methods. New York: Dover Publications, 1948.

MLA-viite (9. p.)

Willers, Friedrich Adolf, ja Robert Thomas tr Beyer. Practical Analysis: Graphical and Numerical Methods. Dover Publications, 1948.