Ngesa, PN.  2014.  Gender and Culture: Some Reminiscences of Sulmena Adek Otula from Childhood in a Rural Set up to Residence in Post - colonial Nairobi, 1949 - 2006. International Journal of Humanities and Social Studies (IJHSS). 2( Issue 11 ):278-285.

Ngesa, PN.  2013.  The Responses of Nairobi Women Traders to Their Vulnerabilities of the 1960s, 23rd - 24th. IFRA sponsored Conference on the 50 th Anniversary of African Independences. , The British Institute of Eastern Africa

Ngesa, PO.  2010.  The Practicing Teacher of History and Historical Objectivity. Website

  2008.  A Book Review "Andrew Mtagwaba Kailembo,The Life andTimes of an African Trade Unionist" by George Gona. . , Nairobi: Printpak

  1997.  An African Women Trader in an Emerging Town 1899-1918. Eastern Africa Journal of Historical And Social Sciences. 1 (2), Nairobi

Ngesa, PO.  1996.  “A History of African Women Traders in Nairobi, 1899-1952”, 1996. , Nirobi: University of Nairobi