Penker, O., Lopez, P., Martinez, L., & SEO/BirdLife. (2017). Golden Eagle, Call of the Wild, de Otmar Penker. Madrid: La Casa Encendida.
Cita MLA (8 ed.) (Copiar al portapapeles)Penker, Otmar, Pascual Lopez, Luis Martinez, and SEO/BirdLife. Golden Eagle, Call of the Wild, De Otmar Penker. Madrid: La Casa Encendida , 2017.