APA (7th ed.) Citation

Schmidt, G., & Tondl, A. (1986). Non-linear vibrations. Univ. Pr.

Chicago Style (17th ed.) Citation

Schmidt, Günter, and Alěs Tondl. Non-linear Vibrations. Cambridge u.a: Univ. Pr, 1986.

MLA (9th ed.) Citation

Schmidt, Günter, and Alěs Tondl. Non-linear Vibrations. Univ. Pr, 1986.