APA aipamena

Alvarado, A., Iturriaga, I., Smyth, J. T., Portuguez, E., & Ureña, J. M. (2008). Residual effect of phosphorus from fertilizer applied to potatoes in Andisols at Juan Viñas, Costa Rica.

Chicago Style aipamena

Alvarado, Alfredo, Isabel Iturriaga, Jot T. Smyth, Edward Portuguez, y Juan M. Ureña. Residual Effect of Phosphorus From Fertilizer Applied to Potatoes in Andisols At Juan Viñas, Costa Rica. 2008.

MLA aipamena

Alvarado, Alfredo, et al. Residual Effect of Phosphorus From Fertilizer Applied to Potatoes in Andisols At Juan Viñas, Costa Rica. 2008.