(1995). Changes in ecosystems. Macmillan.
Cita Chicago (17th ed.)Changes in Ecosystems. New York: Macmillan, 1995.
Cita MLA (9th ed.)Changes in Ecosystems. Macmillan, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)