Roth, A. C., & Baird, R. J. (1985). Small Gas Engines: Fundamentals, Service, Troubleshooting, Repairs. South Holland, IL. : Goodheart.
Lua i Stíl Chicago (17ú heag.)Roth, Alfred C., agus Ronald J. Baird. Small Gas Engines: Fundamentals, Service, Troubleshooting, Repairs. South Holland, IL. : Goodheart, 1985.
Lua MLA (9ú heag.)Roth, Alfred C., agus Ronald J. Baird. Small Gas Engines: Fundamentals, Service, Troubleshooting, Repairs. South Holland, IL. : Goodheart, 1985.
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