^Watson, Donald; McKay, Judith, 1949-, (author.); Queensland. Department of Environment and Heritage; Queensland Museum; Queensland. Department of Administrative Services. Q-Build Project Services (1994), Queensland architects of the 19th century : a biographical dictionary, Queensland Queensland Museum, ISBN978-0-7242-5657-0{{citation}}: |author2= has generic name (help)CS1 maint: multiple names: authors list (link) CS1 maint: numeric names: authors list (link)
^"MR, J. P. O. COWLISHAW". The Week. Vol. C, no. 2, 585. Queensland, Australia. 10 July 1925. p. 20. Retrieved 8 November 2019 – via National Library of Australia.