Kumar, B., & Hansra, B. S. (2000). Extension education for human resource development. Concept Pub. Company.
Lua i Stíl Chicago (17ú heag.)Kumar, Birendra, agus B. S. Hansra. Extension Education for Human Resource Development. New Delhi: Concept Pub. Company, 2000.
Lua MLA (8ú heag.)Kumar, Birendra, agus B. S. Hansra. Extension Education for Human Resource Development. Concept Pub. Company, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.