APA
Courant R., Hilbert D., . (1965). Methods of mathematical physics : partial differential equations. New York: Interscience Publishers.
Chicago
Courant R, Hilbert D, . 1965. Methods of mathematical physics : partial differential equations. New York: Interscience Publishers.
Harvard
Courant R., Hilbert D., . (1965). Methods of mathematical physics : partial differential equations. New York: Interscience Publishers.
MLA
Courant R, Hilbert D, . Methods of mathematical physics : partial differential equations. New York: Interscience Publishers. 1965.