APA
Sørensen B., . (2009). Renewable Energy Focus Handbook. : Academic Press.
Chicago
Sørensen Bent, . 2009. Renewable Energy Focus Handbook. : Academic Press.
Harvard
Sørensen B., . (2009). Renewable Energy Focus Handbook. : Academic Press.
MLA
Sørensen Bent, . Renewable Energy Focus Handbook. : Academic Press. 2009.