APA (7th ed.) Citation

Appell, J., De Pascale, E., & Vignoli, A. (2004). Nonlinear spectral theory. Walter de Gruyter.

Chicago Style (17th ed.) Citation

Appell, Jürgen, Espedito De Pascale, and Alfonso Vignoli. Nonlinear Spectral Theory. Berlin ; New York: Walter de Gruyter, 2004.

MLA (8th ed.) Citation

Appell, Jürgen, et al. Nonlinear Spectral Theory. Walter de Gruyter, 2004.

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