APA (7e ed.) Bronvermelding

GRAVER, B. (1971). Advanced english practice (2nd ed.). O.U.P.

Chicago (17e ed.) Bronvermelding

GRAVER, B.D. Advanced English Practice. 2nd ed. London: O.U.P, 1971.

MLA (9e ed.) Bronvermelding

GRAVER, B.D. Advanced English Practice. 2nd ed. O.U.P, 1971.