A memorial walk path on the Kalgan River commemorates his efforts and work to raise interest and knowledge in local rivers.
In 2008 a memorial scholarship in his name was created to support students of riverine environments in their research.
Select publications
Brock, Margaret A; Pen, Luke J; Canning (W.A.). Council; Brock, Margaret A (1984), Ecological studies of the Canning River Wetland, City of Canning, ISBN978-0-9598148-3-5
Pen, Luke J; Swan River Trust (W.A.) (1993), Fringing vegetation of the Canning, Southern and Wungong Rivers: report to the Swan River Trust, The Trust, ISBN978-0-7309-5468-2
Pen, Luke J; Majer, Karen; Western Australia. Waterways Commission; Pen, Luke; Majer, Karen (1993), Living streams: a guide to bringing watercourses back to life in south-west Western Australia, Waterways Commission, ISBN978-0-7309-5555-9, ISSN1320-2642
↑ Cornish, Patrick.(2002) Rivers of knowledge - Obituary of scientist. Pen, Luke Jerome, 1960-2002. The West Australian, 30/7/2002, Classifieds p. 42
↑Pen, Luke Jerome, 1960-2002. in Obituary article in the Sunday times (Perth, W.A.), 14 July 2002, p.65
↑Pen, Luke J.(1999) Managing our rivers: a guide to the nature and management of the streams of south-west Western Australia (editor, June Hutchison) East Perth, W.A.: Water and Rivers Commission. ISBN0-7309-7450-2
↑Muirden, Peter: Pen, Luke and Marnie Leybourne (2003) Stream and catchment hydrology in South West Western Australia Perth, W.A. Dept. of Environment. Department of Environment river restoration, 1442-6919; report no. RR19 ISBN1-920849-24-6