Παραπομπή APA

Lakshmikantham, V., & Leela, S. (1981). Nonlinear differential equations in abstract spaces. Pergamon Press.

Παραπομπή Chicago Style

Lakshmikantham, V., και S. Leela. Nonlinear Differential Equations in Abstract Spaces. Oxford ; New York: Pergamon Press, 1981.

Παραπομπή MLA

Lakshmikantham, V., και S. Leela. Nonlinear Differential Equations in Abstract Spaces. Pergamon Press, 1981.