Lee, Linda J. (2008). "Busk, Rachel Harriette". In Donald Haase (ed.). The Greenwood encyclopedia of folktales and fairy tales. Vol. 1 (A–F). Westport, Connecticut: Greenwood Press. pp. 149–50. ISBN978-0-313-33442-9. Retrieved 2 March 2011.
llgc.org.uk
welshjournals.llgc.org.uk
"Hans Busk, Radnorshire squire". Radnorshire Society Transactions. 8. Cylchgronau Cymru (Welsh Journals online): 47. 1938. Retrieved 1 March 2011.