Recyclingplas Conference McLean, Virginia, & Plastics Institute of America. (1993). Plastics recycling as a business opportunity: 1993 Recyclingplas VIII Conference, June 3,4 1993, Ritz-Carlton Tysons Corner, McLean, Virginia. Plastics Institute of America.
Cita Chicago (17th ed.)Recyclingplas Conference McLean, Virginia, i Plastics Institute of America. Plastics Recycling as a Business Opportunity: 1993 Recyclingplas VIII Conference, June 3,4 1993, Ritz-Carlton Tysons Corner, McLean, Virginia. Fairfield, N.J.: Plastics Institute of America, 1993.
Cita MLA (8th ed.)Recyclingplas Conference McLean, Virginia, i Plastics Institute of America. Plastics Recycling as a Business Opportunity: 1993 Recyclingplas VIII Conference, June 3,4 1993, Ritz-Carlton Tysons Corner, McLean, Virginia. Plastics Institute of America, 1993.