(1987). Steinbeck bibliographies: An annotated guide / by Robert B. Harmon.
Lua i Stíl Chicago (17ú heag.)Steinbeck Bibliographies: An Annotated Guide / by Robert B. Harmon. 1987.
Lua MLA (9ú heag.)Steinbeck Bibliographies: An Annotated Guide / by Robert B. Harmon. 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.