Cita APA (7a ed.)

Hirzel,Juan, & Walter,Ingrid. (2008). Availability of Nitrogen, Phosphorus and Potassium from Poultry Litter and Conventional Fertilizers in a Volcanic Soil Cultivated with Silage Corn. Instituto de Investigaciones Agropecuarias, INIA.

Cita Chicago Style (17a ed.)

Hirzel,Juan, y Walter,Ingrid. Availability of Nitrogen, Phosphorus and Potassium from Poultry Litter and Conventional Fertilizers in a Volcanic Soil Cultivated with Silage Corn. Instituto de Investigaciones Agropecuarias, INIA, 2008.

Cita MLA (8a ed.)

Hirzel,Juan, y Walter,Ingrid. Availability of Nitrogen, Phosphorus and Potassium from Poultry Litter and Conventional Fertilizers in a Volcanic Soil Cultivated with Silage Corn. Instituto de Investigaciones Agropecuarias, INIA, 2008.