Northern Region Conference on Export Promotion Ludhiana, Northern Region Engineering Export Promotion Council, Indian Institute of Foreign Trade, & Punjab, India (State). Directorate of Industries. (1967). Report of Northern Region Conference on Export Promotion of engineering products. Indian Institute of Foreign Trade.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Northern Region Conference on Export Promotion Ludhiana, Northern Region Engineering Export Promotion Council, Indian Institute of Foreign Trade, و India (State). Directorate of Industries Punjab. Report of Northern Region Conference on Export Promotion of Engineering Products. [New Delhi: Indian Institute of Foreign Trade, 1967.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Northern Region Conference on Export Promotion Ludhiana, et al. Report of Northern Region Conference on Export Promotion of Engineering Products. Indian Institute of Foreign Trade, 1967.