Citazione Stile APA (7a Edizione)

Sagan, H. (1961). Boundary and eigenvalue problems in mathematical physics. Wiley.

Citazione stile Chigago Style (17a edizione)

Sagan, Hans. Boundary and Eigenvalue Problems in Mathematical Physics. New York: Wiley, 1961.

Citatione MLA (9a ed.)

Sagan, Hans. Boundary and Eigenvalue Problems in Mathematical Physics. Wiley, 1961.