Hegger, M., Fuchs, M., Stark, T., & Zuemer, M. (2008). Energy manual: Sustainable architecture. Birkhäuser.
Chicago Style aipamenaHegger, Manfred, Matthias Fuchs, Thomas Stark, and Martin Zuemer. Energy Manual: Sustainable Architecture. Basel: Birkhäuser, 2008.
MLA aipamenaHegger, Manfred, et al. Energy Manual: Sustainable Architecture. Birkhäuser, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.