Gaya APA

Borwein, J., Zhu, Q. (2005). Techniques of Variational Analysis (1st ed. 2005.). New York: Springer.

Gaya MLA

Borwein, Jonathan.., Zhu, Qiji.. "Techniques of Variational Analysis". 1st ed. 2005. New York: Springer, 2005. E Book.