Stagerberg, N. C. (1971). An Introductory English Grammar (2.). Holt, Rinehart and Winston.
Lua i Stíl Chicago (17ú heag.)Stagerberg, Norman C. An Introductory English Grammar. 2. New York, Estados Unidos: Holt, Rinehart and Winston, 1971.
Lua MLA (9ú heag.)Stagerberg, Norman C. An Introductory English Grammar. 2. Holt, Rinehart and Winston, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.