O'Neill, R. V. (1986). A hierarchical concept of ecosystems. Princeton University Press.
Chicago Style (17th ed.) CitationO'Neill, R. V. A Hierarchical Concept of Ecosystems. Princeton: Princeton University Press, 1986.
MLA (9th ed.) CitationO'Neill, R. V. A Hierarchical Concept of Ecosystems. Princeton University Press, 1986.
Warning: These citations may not always be 100% accurate.