APA-viite (7. p.)
ebrary, Inc, Rubik, F., & Frankl, P. (2005). The future of eco-labelling: Making environmental product information systems effective. Greenleaf Pub..
Chicago-viite (17. p.)
ebrary, Inc, Frieder Rubik, ja Paolo Frankl. The Future of Eco-labelling: Making Environmental Product Information Systems Effective. Sheffield: Greenleaf Pub., 2005.
MLA-viite (9. p.)
ebrary, Inc, et al. The Future of Eco-labelling: Making Environmental Product Information Systems Effective. Greenleaf Pub., 2005.
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