Sekharan T A. (1991). Prakrithi chikilsa: Adisthana thathwangalude ulpathiyum vikaasavum. T.S. Sivaprasad.
Chicago Edition CitationSekharan T A. Prakrithi Chikilsa: Adisthana Thathwangalude Ulpathiyum Vikaasavum. [S.l.]: T.S. Sivaprasad, 1991.
Cita MLASekharan T A. Prakrithi Chikilsa: Adisthana Thathwangalude Ulpathiyum Vikaasavum. T.S. Sivaprasad, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.