Παραπομπή APA

Holden , H., & Karlsen, K. H. (2012). Nonlinear partial differential equations. Springer.

Παραπομπή Chicago Style

Holden , Helge, και Kenneth H. Karlsen. Nonlinear Partial Differential Equations. London: Springer, 2012.

Παραπομπή MLA

Holden , Helge, και Kenneth H. Karlsen. Nonlinear Partial Differential Equations. Springer, 2012.