Gaya APA

Chapman, W, K., Paul, L. (2012). Evidence that Northern Pioneering Pines with Tuberculate Mycorrhizae are Unaffected by Varying Soil Nitrogen Levels . : Springer-Verlag.

Gaya MLA

Chapman, William, Kenneth., Paul, Leslie. "Evidence that Northern Pioneering Pines with Tuberculate Mycorrhizae are Unaffected by Varying Soil Nitrogen Levels". : Springer-Verlag, 2012. e-journal.