Gaya APA

Roth, A, C., J., I, B, R. (1985). Small gas engines 2 cycle and 4 cycle engines fundamentals, service, ì troubleshooting, repairs . Illinois: Illinois: The Goodheart-Willcox; 1985.

Gaya MLA

Roth, Alfred, C.., J., I., Baird,, Ronald. "Small gas engines 2 cycle and 4 cycle engines fundamentals, service, ì troubleshooting, repairs". Illinois: Illinois: The Goodheart-Willcox; 1985, 1985. Text.