Wake, P. V. (1969). Opal men. Reed.
Lua i Stíl Chicago (17ú heag.)Wake, Percival Vincent. Opal Men. Sydney: Reed, 1969.
Lua MLA (9ú heag.)Wake, Percival Vincent. Opal Men. Reed, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.