Darshan Singh, Ranjit Singh (2003) Ethnicity, development and federal-state relations in Sabah and Sarawak, 1963-1990. In: The state, economic development and ethnic co-existence in Malaysia and New Zealand. Centre for Economic Development and Ethnic Relations, University of Malaya, Kuala Lumpur, pp. 55-71. ISBN 983-9962-14-7

Darshan Singh, Ranjit Singh (2013) It's time to close the chapter. (10 March 2013). in Sunday Star, p. p. 23.

Darshan Singh, Ranjit Singh (2008) The Pedra Branca/Pulau Batu Puteh case at the International Court of Justice (ICT): Some observations. In: The seas divide: geopolitics and maritime issues in Southeast Asia. Institute of Ocean and Earth Sciences, University of Malaya, Kuala Lumpur, pp. 83-96. ISBN 978-983-9576-37-5

Darshan Singh, Ranjit Singh (2013) Tracing the origins of Malaysia. (15 September 2013). in Sunday Star, p. p. 31.

Othman, Muhammad Fuad and Ojonumiache Sule, Imaji Zekeri and Darshan Singh, Ranjit Singh (2015) An analysis of the impact of Boko Haram insurgents on business entrepreneurship environment in Nigeria. Academic Journal of Interdisciplinary Studies, 4 (3). pp. 37-44. ISSN 2281-3993