^Perschbacher, Gerald (2010-03-25), "High times for the highwheeler: as America's first great highwheeler, the Holsman was hard to beat", Old Cars Weekly, F+W Media, Inc: 16(1), ISSN0048-1637
^"MOTOR BUGGIES". The Sydney Morning Herald. No. 22, 553. New South Wales, Australia. 27 April 1910. p. 11. Retrieved 13 May 2017 – via National Library of Australia.