APA (7th ed.) Citation

Logan, J. D. (1977). Invariant variational principles. Academic Press.

Chicago Style (17th ed.) Citation

Logan, J. David. Invariant Variational Principles. New York: Academic Press, 1977.

MLA (8th ed.) Citation

Logan, J. David. Invariant Variational Principles. Academic Press, 1977.

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