APA-referens (7:e uppl.)

Beals, M. (1989). Propagation and Interaction of Singularities in Nonlinear Hyperbolic Problems (1st ed. 1989.). Birkhäuser Boston : Imprint: Birkhäuser. https://doi.org/10.1007/978-1-4612-4554-4

Chicago-referens (17:e uppl.)

Beals, Michael. Propagation and Interaction of Singularities in Nonlinear Hyperbolic Problems. 1st ed. 1989. Boston, MA: Birkhäuser Boston : Imprint: Birkhäuser, 1989. https://doi.org/10.1007/978-1-4612-4554-4.

MLA-referens (9:e uppl.)

Beals, Michael. Propagation and Interaction of Singularities in Nonlinear Hyperbolic Problems. 1st ed. 1989. Birkhäuser Boston : Imprint: Birkhäuser, 1989. https://doi.org/10.1007/978-1-4612-4554-4.