Wickremasinghe, R. and Perera, K., 2010. Factors affecting Quality, Strength and Colour of Black Tea Liquors. Journal of the National Science Foundation of Sri Lanka, 1(2), pp.111–121.

Wickremasinghe R, Perera K. Factors affecting Quality, Strength and Colour of Black Tea Liquors. Journal of the National Science Foundation of Sri Lanka. 2010;1(2):111–21.

Wickremasinghe, R., & Perera, K. (2010). Factors affecting Quality, Strength and Colour of Black Tea Liquors. Journal of the National Science Foundation of Sri Lanka, 1(2), 111–121.

1. Wickremasinghe R, Perera K. Factors affecting Quality, Strength and Colour of Black Tea Liquors. Journal of the National Science Foundation of Sri Lanka. 2010;1(2):111-121.

Wickremasinghe R and Perera K, ‘Factors Affecting Quality, Strength and Colour of Black Tea Liquors’ (2010) 1 Journal of the National Science Foundation of Sri Lanka 111

Wickremasinghe, RL, and KPWC Perera. 2010. “Factors Affecting Quality, Strength and Colour of Black Tea Liquors”. Journal of the National Science Foundation of Sri Lanka 1 (2): 111–21.

Wickremasinghe, RL, and KPWC Perera. “Factors Affecting Quality, Strength and Colour of Black Tea Liquors”. Journal of the National Science Foundation of Sri Lanka 1, no. 2 (2010): 111–21.

Wickremasinghe, Rand K Perera. “Factors affecting Quality, Strength and Colour of Black Tea Liquors”. Journal of the National Science Foundation of Sri Lanka, vol. 1, no. 2, 2010, pp. 111–21.