Schultz, R. (1998). Oil spill response performance review of skimmers. ASTM.
Cita Chicago (17th ed.)Schultz, Robert. Oil Spill Response Performance Review of Skimmers. West Conshohocken, PA: ASTM, 1998.
Cita MLA (9th ed.)Schultz, Robert. Oil Spill Response Performance Review of Skimmers. ASTM, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.