Παραπομπή APA

Begehr, H. G. W., & Wen, G. C. (1996). Nonlinear elliptic boundary value problems and their applications. Edinburgh Gate: Longman.

Παραπομπή Chicago Style

Begehr, Heinrich G. W., and Guo Chun Wen. Nonlinear Elliptic Boundary Value Problems and Their Applications. Edinburgh Gate: Longman, 1996.

Παραπομπή MLA

Begehr, Heinrich G. W., and Guo Chun Wen. Nonlinear Elliptic Boundary Value Problems and Their Applications. Edinburgh Gate: Longman, 1996.

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