Pearman, R. (1999). Hard wired leadership. Jaico.
Lua i Stíl Chicago (17ú heag.)Pearman, Roger. Hard Wired Leadership. Mumbai: Jaico, 1999.
Lua MLA (9ú heag.)Pearman, Roger. Hard Wired Leadership. Jaico, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.