(en) Johnson Kiriaku Kinyua, The Agikuyu, the Bible and Colonial Constructs: Towards an Ordinary African Readers' Hermeneutics, University of Birmingham, (lire en ligne), p. 10.
books.google.com
(en) Robert Benedetto et Donald K. McKim, Historical Dictionary of the Reformed Churches, Scarecrow Press, (lire en ligne), p. 464.
(en) James Karanja, The Missionary Movement in Colonial Kenya: The Foundation of Africa Inland Church, Göttingen, Cuvillier Verlag, (lire en ligne), p. 93.
st-andrews.ac.uk
(en) Letter from Marion S Stevenson, University of St Andrews archives (lire en ligne).
uoguelph.ca
irss.uoguelph.ca
(en) Kenneth Mufuka, « Scottish Missionaries and the Circumcision Controversy in Kenya, 1900–1960 », International Review of Scottish Studies, no 28, , p. 55 (lire en ligne).