Cita APA (7a ed.)
Smith, J., & Umali, G. (1984). Fertilizer recommendations based on soil-nitrogen levels - a total nutrient model. Wiley.
Cita Chicago Style (17a ed.)
Smith, Joyotee, y Gloria Umali. Fertilizer Recommendations Based on Soil-nitrogen Levels - a Total Nutrient Model. Wiley, 1984.
Cita MLA (9a ed.)
Smith, Joyotee, y Gloria Umali. Fertilizer Recommendations Based on Soil-nitrogen Levels - a Total Nutrient Model. Wiley, 1984.
Precaución: Estas citas no son 100% exactas.