APA

Allen J. P. B., Widdowson H. G., . (1978). English in physical science. Oxford: Oxford University Press.

Chicago

Allen J P B, Widdowson H G, . 1978. English in physical science. Oxford: Oxford University Press.

Harvard

Allen J. P. B., Widdowson H. G., . (1978). English in physical science. Oxford: Oxford University Press.

MLA

Allen J P B, Widdowson H G, . English in physical science. Oxford: Oxford University Press. 1978.