Tamil Nadu (India). Department of Industries and Commerce. (1981). Directory of Tamilnadu small scale industrial units (as on 31-12-80), districts Madurai, Tirunelveli, Kanyakumari. Director of Industries and Commerce, Govt. of Tamilnadu.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Tamil Nadu (India). Department of Industries and Commerce. Directory of Tamilnadu Small Scale Industrial Units (as on 31-12-80), Districts Madurai, Tirunelveli, Kanyakumari. Madras: Director of Industries and Commerce, Govt. of Tamilnadu, 1981.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Tamil Nadu (India). Department of Industries and Commerce. Directory of Tamilnadu Small Scale Industrial Units (as on 31-12-80), Districts Madurai, Tirunelveli, Kanyakumari. Director of Industries and Commerce, Govt. of Tamilnadu, 1981.