APA (7th ed.) Citation

Krylov, N. M., & Bogoljubov, N. N. (1955). Introduction to non-linear mechanics (4. print.). Princeton Univ. Press [u.a.].

Chicago Style (17th ed.) Citation

Krylov, Nikolaj M., and Nikolaj N. Bogoljubov. Introduction to Non-linear Mechanics. 4. print. Princeton [u.a]: Princeton Univ. Press [u.a.], 1955.

MLA (9th ed.) Citation

Krylov, Nikolaj M., and Nikolaj N. Bogoljubov. Introduction to Non-linear Mechanics. 4. print. Princeton Univ. Press [u.a.], 1955.