APA (7 वां संस्करण) प्रशस्ति पत्र

Wren, P. (1971). High school English grammer and composition (82nd edn.). K & J Cooper publication.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Wren, P.C. High School English Grammer and Composition. 82nd edn. Mumbai: K & J Cooper publication, 1971.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Wren, P.C. High School English Grammer and Composition. 82nd edn. K & J Cooper publication, 1971.