APA

Graver B. D., . (1979). Advanced english practice. Oxford: Oxford University Press.

Chicago

Graver B D, . 1979. Advanced english practice. Oxford: Oxford University Press.

Harvard

Graver B. D., . (1979). Advanced english practice. Oxford: Oxford University Press.

MLA

Graver B D, . Advanced english practice. Oxford: Oxford University Press. 1979.