Cita APA (7th ed.)

SUMMERFIELD, G. e. (1971). English in practice secondary English departments: At work ed. C.U.P.

Cita Chicago (17th ed.)

SUMMERFIELD, Geoffrey ed. English in Practice Secondary English Departments: At Work Ed. London: C.U.P, 1971.

Cita MLA (9th ed.)

SUMMERFIELD, Geoffrey ed. English in Practice Secondary English Departments: At Work Ed. C.U.P, 1971.