APA

Wellstead P. E., . (1979). Introduction Physical System Modelling. London: Academic Press.

Chicago

Wellstead P E, . 1979. Introduction Physical System Modelling. London: Academic Press.

Harvard

Wellstead P. E., . (1979). Introduction Physical System Modelling. London: Academic Press.

MLA

Wellstead P E, . Introduction Physical System Modelling. London: Academic Press. 1979.