Yari, M. & Khadwmol Hosseini, N. (2010). Effect of Operator’s Age, Formal Education and Technical Level on Variable Costs of Convertional Tractors at Arak Town Countries. Agricultural Engineering, 1.32(Published articles (periods 1 to 32) in the field of agricultural engineering before the separation of the scientific journal of agriculture in the years 1975-2009), 49–57. https://doi.org/10.22055/agen.2010.15460
MLA
Yari, M., & Khadwmol Hosseini, N. "Effect of Operator’s Age, Formal Education and Technical Level on Variable Costs of Convertional Tractors at Arak Town Countries", Agricultural Engineering, 1.32, Published articles (periods 1 to 32) in the field of agricultural engineering before the separation of the scientific journal of agriculture in the years 1975-2009, 2010, 49–57. doi: 10.22055/agen.2010.15460
HARVARD
Yari, M., & Khadwmol Hosseini, N. (2010). 'Effect of Operator’s Age, Formal Education and Technical Level on Variable Costs of Convertional Tractors at Arak Town Countries', Agricultural Engineering, 1.32(Published articles (periods 1 to 32) in the field of agricultural engineering before the separation of the scientific journal of agriculture in the years 1975-2009), pp. 49–57. doi: 10.22055/agen.2010.15460
CHICAGO
Yari, M. & Khadwmol Hosseini, N., "Effect of Operator’s Age, Formal Education and Technical Level on Variable Costs of Convertional Tractors at Arak Town Countries." Agricultural Engineering, 1.32 Published articles (periods 1 to 32) in the field of agricultural engineering before the separation of the scientific journal of agriculture in the years 1975-2009 (2010): 49–57, doi: 10.22055/agen.2010.15460
VANCOUVER
Yari M., Khadwmol Hosseini N. Effect of Operator’s Age, Formal Education and Technical Level on Variable Costs of Convertional Tractors at Arak Town Countries. Agricultural Engineering. 2010;1.32(Published articles (periods 1 to 32) in the field of agricultural engineering before the separation of the scientific journal of agriculture in the years 1975-2009):49–57 (In Persian). doi: 10.22055/agen.2010.15460
