Dennis D. Cordell, Elizabeth Omoluabi and Nancy Stiegler. Chapter III - Historical Demography on Sub-Saharan Africa (1975−2010), A Global History of Historical Demography. Time for an Anthology by Antoinette Fauve-Chamoux, Ioan Bolovan and Sølvi Sogner. 2017. Peter Lang Publishing. SBN :978-3-0343-2303-1
https://www.peterlang.com/view/9783034323031/Contents.xhtml
2. STIEGLER Nancy, “Infant mortality in the Western Cape”, Chapter 3, The State of the Population in the Western Cape, HSRC press, September 2008. ISBN-978-0-7696-2226-7
https://www.hsrcpress.ac.za/books/the-state-of-the-population-in-the-western-cape-province