YORKEY RICHARD. (1981). REPLY REQUESTED 30 LETTERS OF ADVICE. ADDISON-WESLEY.
Lua i Stíl Chicago (17ú heag.)YORKEY RICHARD. REPLY REQUESTED 30 LETTERS OF ADVICE. NEW YORK: ADDISON-WESLEY, 1981.
Lua MLA (9ú heag.)YORKEY RICHARD. REPLY REQUESTED 30 LETTERS OF ADVICE. ADDISON-WESLEY, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.