APA (7th ed.) Citation

Machado, R., & Campos, T. (2013). Effect of nitrogen source on soil nitrate concentration and yield, and quality of intermediate-day onions.

Chicago Style (17th ed.) Citation

Machado, Rui, and Tiago Campos. Effect of Nitrogen Source on Soil Nitrate Concentration and Yield, and Quality of Intermediate-day Onions. 2013.

MLA (8th ed.) Citation

Machado, Rui, and Tiago Campos. Effect of Nitrogen Source on Soil Nitrate Concentration and Yield, and Quality of Intermediate-day Onions. 2013.

Warning: These citations may not always be 100% accurate.