Cita APA (7a ed.)
Ek, L. (2004). The establishment of Norway spruce (Picea abies (L.) Karst.) on two mountains in the Åre area.
Cita Chicago Style (17a ed.)
Ek, Lars-Göran. The Establishment of Norway Spruce (Picea Abies (L.) Karst.) on Two Mountains in the Åre Area. 2004.
Cita MLA (9a ed.)
Ek, Lars-Göran. The Establishment of Norway Spruce (Picea Abies (L.) Karst.) on Two Mountains in the Åre Area. 2004.
Precaución: Estas citas no son 100% exactas.