APA

La Salle J. P., Lefschetz S., . (1963). International symposium on nonlinear differential equations and nonlinear mechanics. New York: Academic Press.

Chicago

La Salle Joseph P, Lefschetz Solomon, . 1963. International symposium on nonlinear differential equations and nonlinear mechanics. New York: Academic Press.

Harvard

La Salle J. P., Lefschetz S., . (1963). International symposium on nonlinear differential equations and nonlinear mechanics. New York: Academic Press.

MLA

La Salle Joseph P, Lefschetz Solomon, . International symposium on nonlinear differential equations and nonlinear mechanics. New York: Academic Press. 1963.