MLA

Brouwer, Andries E, and Willem H Haemers. Spectra of Graphs. Springer New York, 2012.

APA

Brouwer, A. E, & Haemers, W. H. (2012). Spectra of Graphs. Springer New York.

Chicago

Brouwer, Andries E., and Willem H Haemers. Spectra of Graphs. : Springer New York, 2012.