APA (7th ed.) Citation

Moiseiwitsch, B. L. (1966). Variational principles. Interscience Publishers.

Chicago Style (17th ed.) Citation

Moiseiwitsch, B. L. Variational Principles. London ; New York: Interscience Publishers, 1966.

MLA (9th ed.) Citation

Moiseiwitsch, B. L. Variational Principles. Interscience Publishers, 1966.

Warning: These citations may not always be 100% accurate.