Umeki, T. (1990). Effects of power-tiller use on farm income in the sage plain area, sage preffecture, Japan. Japan: Department of Agriculture Economics.
استشهاد بنمط شيكاغوUmeki, Toshimi. Effects of Power-tiller Use On Farm Income in the Sage Plain Area, Sage Preffecture, Japan. Japan: Department of Agriculture Economics, 1990.
MLA استشهادUmeki, Toshimi. Effects of Power-tiller Use On Farm Income in the Sage Plain Area, Sage Preffecture, Japan. Japan: Department of Agriculture Economics, 1990.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.