Sigdel, A., & Chaudhary, S. S. (1998). A study of the effectiveness of pulse polio immunization programme (PPIP) - 2053 B.S.
Lua i Stíl Chicago (17ú heag.)Sigdel, Abindra, agus Sanjay Srivastava Chaudhary. A Study of the Effectiveness of Pulse Polio Immunization Programme (PPIP) - 2053 B.S. 1998.
Lua MLA (8ú heag.)Sigdel, Abindra, agus Sanjay Srivastava Chaudhary. A Study of the Effectiveness of Pulse Polio Immunization Programme (PPIP) - 2053 B.S. 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.