Jain , G. (1998). Research methodology: Methods, tools and techniques. Mangal Deep.
Lua i Stíl Chicago (17ú heag.)Jain , Gopal. Research Methodology: Methods, Tools and Techniques. Jaipur: Mangal Deep, 1998.
Lua MLA (9ú heag.)Jain , Gopal. Research Methodology: Methods, Tools and Techniques. Mangal Deep, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.