APA
Higgins, . (2015). A Systems Approach To Environmental Management. : Dunedin.
Chicago
Higgins, . 2015. A Systems Approach To Environmental Management. : Dunedin.
Harvard
Higgins, . (2015). A Systems Approach To Environmental Management. : Dunedin.
MLA
Higgins, . A Systems Approach To Environmental Management. : Dunedin. 2015.