Cita APA (7a ed.)

Christ, H. I. (1982). Modern english in action. D.C. Heath and Comp.

Cita Chicago Style (17a ed.)

Christ, Henry I. Modern English in Action. D.C. Heath and Comp, 1982.

Cita MLA (8a ed.)

Christ, Henry I. Modern English in Action. D.C. Heath and Comp, 1982.