Graham, F. (1970). Since Silent spring. Fawcett Pub.
Lua i Stíl Chicago (17ú heag.)Graham, Frank. Since Silent Spring. Greewich, Conn: Fawcett Pub, 1970.
Lua MLA (9ú heag.)Graham, Frank. Since Silent Spring. Fawcett Pub, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.