Cita APA (7th ed.)
Elsevier & Henderson, P. Rare Earth Element Geochemistry.
Cita Chicago (17th ed.)
Elsevier i Paul Henderson. Rare Earth Element Geochemistry.
Cita MLA (9th ed.)
Elsevier i Paul Henderson. Rare Earth Element Geochemistry.
Atenció: Aquestes cites poden no estar 100% correctes.