Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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