APA (7th ed.) Citation

Andronov, A. A., Vitt, A. A., & Khaĭkin, S. Ė. Theory of oscillators.

Chicago Style (17th ed.) Citation

Andronov, A. A., A. A. Vitt, and S. Ė Khaĭkin. Theory of Oscillators.

MLA (9th ed.) Citation

Andronov, A. A., et al. Theory of Oscillators.