Gaya APA

Roth, A, C., J., I, B, R. (1981). Small gas engine fundamentals, service, troubelshooting, repairs . Illinois: Illinois: The Goodherat-Willcox; 1981.

Gaya MLA

Roth, Alfred, C.., J., I., Baird,, Ronald. "Small gas engine fundamentals, service, troubelshooting, repairs". Illinois: Illinois: The Goodherat-Willcox; 1981, 1981. Text.