Billiet, W. E. (1982). Small gas engines & power transmission systems: A repair and maintenance handbook. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Billiet, Walter E. Small Gas Engines & Power Transmission Systems: A Repair and Maintenance Handbook. Englewood Cliffs, N.J.: Prentice-Hall, 1982.
Lua MLA (9ú heag.)Billiet, Walter E. Small Gas Engines & Power Transmission Systems: A Repair and Maintenance Handbook. Prentice-Hall, 1982.
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