Meldrum, J. S. (2016). Clean snowmobile challenge- 1: The early years, 4-stroke engines make their debut. Society of Automotive Engineers.
Chicago-viite (17. p.)Meldrum, Jay S. Clean Snowmobile Challenge- 1: The Early Years, 4-stroke Engines Make Their Debut. Warrendale, Pennsylvania: Society of Automotive Engineers, 2016.
MLA-viite (9. p.)Meldrum, Jay S. Clean Snowmobile Challenge- 1: The Early Years, 4-stroke Engines Make Their Debut. Society of Automotive Engineers, 2016.
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