Seminar on Modernisation and the Environment, Pinang Pulau Pinang, Malaysia, Malayan Nature Society. Penang Branch, Consumers Association of Penang, Lim, W. C., & Ravinder Singh. (1974). Proceedings of the Seminar on Modernisation and the Environment. Consumers Association of Penang.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Seminar on Modernisation and the Environment, Pinang Pulau Pinang, Malaysia, Malayan Nature Society. Penang Branch, Consumers Association of Penang, Wah Ching Lim, و Ravinder Singh. Proceedings of the Seminar on Modernisation and the Environment. [Penang]: Consumers Association of Penang, 1974.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Seminar on Modernisation and the Environment, Pinang Pulau Pinang, Malaysia, et al. Proceedings of the Seminar on Modernisation and the Environment. Consumers Association of Penang, 1974.