Gaya APA

Roth, A, C. (1992). Workbook for Small Gas Engines: Fundamentals, Service, Troubleshooting, repair (-). America: The Goodheart - Willcox.

Gaya MLA

Roth, Alfred, C. "Workbook for Small Gas Engines: Fundamentals, Service, Troubleshooting, repair". - America: The Goodheart - Willcox, 1992. Text.