APA

Williams W. E., . (1980). Partial differential equations. Oxford [Eng.]: Clarendon Press; New York: Oxford University Press.

Chicago

Williams William Elwyn, . 1980. Partial differential equations. Oxford [Eng.]: Clarendon Press; New York: Oxford University Press.

Harvard

Williams W. E., . (1980). Partial differential equations. Oxford [Eng.]: Clarendon Press; New York: Oxford University Press.

MLA

Williams William Elwyn, . Partial differential equations. Oxford [Eng.]: Clarendon Press; New York: Oxford University Press. 1980.