Cita APA (7th ed.)
ebrary, Inc, & Spies, R. B. (2007). Long-term ecological change in the Northern Gulf of Alaska. Elsevier.
Cita Chicago (17th ed.)
ebrary, Inc, i Robert Bernard Spies. Long-term Ecological Change in the Northern Gulf of Alaska. Amsterdam: Elsevier, 2007.
Cita MLA (9th ed.)
ebrary, Inc, i Robert Bernard Spies. Long-term Ecological Change in the Northern Gulf of Alaska. Elsevier, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.