^
Conti, L; Wilke, S; Koska, L; Water Authority of Western Australia. Headworks and Treatment Region; Water Authority of Western Australia. Scientific Services Branch (1991),
Lower Helena catchment water quality study, Headworks & Treatment Region [and] Scientific Services Branch, Water Authority of Western Australia, retrieved 9 July 2017
^Western Australian Planning Commission; Western Australia. Water and Rivers Commission (2003), Middle Helena catchment area land use and water management strategy : published by the Western Australian Planning Commission for public comment, August 2003, Western Australian Planning Commission,
ISBN978-0-7309-9393-3
^Western Australian Planning Commission (2010), Middle Helena catchment area land use and water management strategy, Western Australian Planning Commission,
ISBN978-0-7309-9976-8