Herren, R. V., & Ray V. Herren. (2006). Agricultural mechanics: Fundamentals & applications. Clifton Park, NY: Delmar Cengage Learning.
Dyfyniad Arddull ChicagoHerren, Ray V., và Ray V. Herren. Agricultural Mechanics: Fundamentals & Applications. Clifton Park, NY: Delmar Cengage Learning, 2006.
Dyfyniad MLAHerren, Ray V., và Ray V. Herren. Agricultural Mechanics: Fundamentals & Applications. Clifton Park, NY: Delmar Cengage Learning, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.