Usha Nilsson. (1969). Surdas: Makers of Indian Literature. Sahitya Akademi.
Chicago Style aipamenaUsha Nilsson. Surdas: Makers of Indian Literature. New Delhi: Sahitya Akademi, 1969.
MLA aipamenaUsha Nilsson. Surdas: Makers of Indian Literature. Sahitya Akademi, 1969.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.