Science Reference and Information Service & Grayson, L. (1991). Recycling new materials from community waste: A guide to sources. Science Reference and Information Service.
Παραπομπή σε μορφή Chicago (17η εκδ.)Science Reference and Information Service και Lesley Grayson. Recycling New Materials from Community Waste: A Guide to Sources. London: Science Reference and Information Service, 1991.
Παραπομπή σε μορφή MLA (9th εκδ.)Science Reference and Information Service και Lesley Grayson. Recycling New Materials from Community Waste: A Guide to Sources. Science Reference and Information Service, 1991.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.