Lefschetz, S. (1950). Contributions to the theory of nonlinear oscillations. Kraus Reprint.
Chicago Style (17th ed.) CitationLefschetz, Solomon. Contributions to the Theory of Nonlinear Oscillations. New York: Kraus Reprint, 1950.
MLA (8th ed.) CitationLefschetz, Solomon. Contributions to the Theory of Nonlinear Oscillations. Kraus Reprint, 1950.
Warning: These citations may not always be 100% accurate.