Pillai, V. P. R., & Mathew, E. T. (1973). Burden of taxation in Kerala: A comparative study of the burden of taxation of the agricultural and nonagricultural sectors of Kerala, 1967-68. Research Programmes Committee, Planning Commission, Govt. of India.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPillai, Velu Pillai Raman, और Elangikal Thomas Mathew. Burden of Taxation in Kerala: A Comparative Study of the Burden of Taxation of the Agricultural and Nonagricultural Sectors of Kerala, 1967-68. [New Delhi?]: Research Programmes Committee, Planning Commission, Govt. of India, 1973.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPillai, Velu Pillai Raman, और Elangikal Thomas Mathew. Burden of Taxation in Kerala: A Comparative Study of the Burden of Taxation of the Agricultural and Nonagricultural Sectors of Kerala, 1967-68. Research Programmes Committee, Planning Commission, Govt. of India, 1973.