Cita APA (7a ed.)

Palm, J., & Palm, J. (2010). Energy Efficiency. IntechOpen.

Cita Chicago Style (17a ed.)

Palm, Jenny, y Jenny Palm. Energy Efficiency. [Place of publication not identified]: IntechOpen, 2010.

Cita MLA (9a ed.)

Palm, Jenny, y Jenny Palm. Energy Efficiency. IntechOpen, 2010.