Pettigrew, A. (2011). The Role, Power and Influence of Company Chairs.
Lua i Stíl Chicago (17ú heag.)Pettigrew, A. The Role, Power and Influence of Company Chairs. 2011.
Lua MLA (9ú heag.)Pettigrew, A. The Role, Power and Influence of Company Chairs. 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.