APA-viite (7. p.)

Zangwill, W. I. (1969). Nonlinear programming: A unified approach. Prentice-Hall.

Chicago-viite (17. p.)

Zangwill, Willard I. Nonlinear Programming: A Unified Approach. Englewood Cliffs, N.J: Prentice-Hall, 1969.

MLA-viite (9. p.)

Zangwill, Willard I. Nonlinear Programming: A Unified Approach. Prentice-Hall, 1969.