Lua APA (7ú heag.)
ebrary, Inc, & Pettman, B. (2004). 30 years of IJSE: Festschrift in honour of Professor John O'Brien. Emerald Group Pub..
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc, agus Barrie Pettman. 30 Years of IJSE: Festschrift in Honour of Professor John O'Brien. [Bradford, England]: Emerald Group Pub., 2004.
Lua MLA (9ú heag.)
ebrary, Inc, agus Barrie Pettman. 30 Years of IJSE: Festschrift in Honour of Professor John O'Brien. Emerald Group Pub., 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.