Παραπομπή APA

Bluman, G. W., & Bluman, G. W. K. (1989). Symmetries and differential equations. Springer.

Παραπομπή Chicago Style

Bluman, George W., και George W.; Kumei Bluman. Symmetries and Differential Equations. New York: Springer, 1989.

Παραπομπή MLA

Bluman, George W., και George W.; Kumei Bluman. Symmetries and Differential Equations. Springer, 1989.