Cita APA (7th ed.)
ebrary, Inc, Rubik, F., & Frankl, P. (2005). The future of eco-labelling: Making environmental product information systems effective. Greenleaf Pub..
Cita Chicago (17th ed.)
ebrary, Inc, Frieder Rubik, i Paolo Frankl. The Future of Eco-labelling: Making Environmental Product Information Systems Effective. Sheffield: Greenleaf Pub., 2005.
Cita MLA (9th ed.)
ebrary, Inc, et al. The Future of Eco-labelling: Making Environmental Product Information Systems Effective. Greenleaf Pub., 2005.
Atenció: Aquestes cites poden no estar 100% correctes.