Ananda Jayawickrama. 1999. Service sector in the economy of Sri Lanka : performance and future challenges. Faculty of Economics, Thammasat University;
Ananda Jayawickrama. (1999) Service sector in the economy of Sri Lanka : performance and future challenges . Thammasat University/Bangkok.
Ananda Jayawickrama. Service sector in the economy of Sri Lanka : performance and future challenges. . Bangkok:Thammasat University, 1999.
Ananda Jayawickrama. (1999) Service sector in the economy of Sri Lanka : performance and future challenges . Thammasat University/Bangkok.