Citazione Stile APA (7a Edizione)
Hahlbrock, K., Skogley, D., & Wiegandt, K. (2009). Feeding the planet: Environmental protection through sustainable agriculture. Haus Publishing.
Citazione stile Chigago Style (17a edizione)
Hahlbrock, Klaus, David Skogley, e Klaus Wiegandt. Feeding the Planet: Environmental Protection Through Sustainable Agriculture. London, [England]: Haus Publishing, 2009.
Citatione MLA (9a ed.)
Hahlbrock, Klaus, et al. Feeding the Planet: Environmental Protection Through Sustainable Agriculture. Haus Publishing, 2009.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.