APA
Salter Robert M, Ames J W, . (1928). Plant composition as a guide to the availability of soil nutrients. : Journal of the American Society of Agronomy.
Chicago
Salter Robert M, Ames J W, . 1928. Plant composition as a guide to the availability of soil nutrients. : Journal of the American Society of Agronomy.
Harvard
Salter Robert M, Ames J W, . (1928). Plant composition as a guide to the availability of soil nutrients. : Journal of the American Society of Agronomy.
MLA
Salter Robert M, Ames J W, . Plant composition as a guide to the availability of soil nutrients. : Journal of the American Society of Agronomy. 1928.