Gaya APA

Yang, J. et al (2009). Natural Variation for Nutrient Use and Remobilization Efficiencies in Switchgrass . New York: Springer Science Business Media.

Gaya MLA

Yang, Jiading. et al. "Natural Variation for Nutrient Use and Remobilization Efficiencies in Switchgrass". New York: Springer Science Business Media, 2009. e-journal.