Foreign language testing
MLA
Perren, G. E. Foreign Language Testing. [New ed.] / [London]: [C.I.L.T.], 1977
APA, 7th edition
Perren, G. E. (1977). Foreign language testing. [New ed.] / [London]: [C.I.L.T.]
Chicago, 17th edition
Perren, G. E. Foreign language testing. [New ed.] / [London]: [C.I.L.T.], 1977