Παραπομπή σε μορφή APA (7η εκδ.)

Petryshyn, W. V. (1993). Approximation solvability of nonlinear funcional and diferential equations. Marcel Dekker.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Petryshyn, Wolodymyr V. Approximation Solvability of Nonlinear Funcional and Diferential Equations. Nueva York: Marcel Dekker, 1993.

Παραπομπή σε μορφή MLA (9th εκδ.)

Petryshyn, Wolodymyr V. Approximation Solvability of Nonlinear Funcional and Diferential Equations. Marcel Dekker, 1993.