Harber, H. L. (1970). Teaching reading in content areas. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Harber, Harold L. Teaching Reading in Content Areas. Englewood Cliffs, NJ: Prentice-Hall, 1970.
Lua MLA (9ú heag.)Harber, Harold L. Teaching Reading in Content Areas. Prentice-Hall, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.