Horn, A. (1998). Gifts, of Ledership. Macmillan India Ltd.
Lua i Stíl Chicago (17ú heag.)Horn, Art. Gifts, of Ledership. Delhi: Macmillan India Ltd, 1998.
Lua MLA (9ú heag.)Horn, Art. Gifts, of Ledership. Macmillan India Ltd, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.