Lua APA (7ú heag.)
Singh, O. P. (2012). Art of effective communication in group discussion and interview. S. Chand & Company Ltd.
Lua i Stíl Chicago (17ú heag.)
Singh, O. P. Art of Effective Communication in Group Discussion and Interview. Kolkata: S. Chand & Company Ltd, 2012.
Lua MLA (9ú heag.)
Singh, O. P. Art of Effective Communication in Group Discussion and Interview. S. Chand & Company Ltd, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.