APA

Kumada K., . (1987). Chemistry of soil organic matter. Tokyo: Japan Scientific Societies Pr. [u.a.].

Chicago

Kumada Kyoichi, . 1987. Chemistry of soil organic matter. Tokyo: Japan Scientific Societies Pr. [u.a.].

Harvard

Kumada K., . (1987). Chemistry of soil organic matter. Tokyo: Japan Scientific Societies Pr. [u.a.].

MLA

Kumada Kyoichi, . Chemistry of soil organic matter. Tokyo: Japan Scientific Societies Pr. [u.a.]. 1987.