Wren, P. (1971). High school English grammer and composition (82nd edn.). K & J Cooper publication.
Cita Chicago (17th ed.)Wren, P.C. High School English Grammer and Composition. 82nd edn. Mumbai: K & J Cooper publication, 1971.
Cita MLA (9th ed.)Wren, P.C. High School English Grammer and Composition. 82nd edn. K & J Cooper publication, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.