Hiansen, E. Q., Rodriguez, R., Jr., & Tan, R. (1979). Feasibility study on the manufacture of disc plows, disc harrows and rotary tillers. Animo Repository.
استشهاد بنمط شيكاغوHiansen, Ernesto Qua, Rodrigo Rodriguez, Jr, و Robert Tan. Feasibility Study On the Manufacture of Disc Plows, Disc Harrows and Rotary Tillers. Animo Repository, 1979.
MLA استشهادHiansen, Ernesto Qua, Rodrigo Rodriguez, Jr, و Robert Tan. Feasibility Study On the Manufacture of Disc Plows, Disc Harrows and Rotary Tillers. Animo Repository, 1979.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.