Keith, L. H., & Keith, L. H. (1996). Compilation of EPA's sampling and analysis methods (2nd ed.). Boca Raton: CRC/Lewis Publishers.
Παραπομπή Chicago StyleKeith, Lawrence H., and Lawrence H. Keith. Compilation of EPA's Sampling and Analysis Methods. 2nd ed. Boca Raton: CRC/Lewis Publishers, 1996.
Παραπομπή MLAKeith, Lawrence H., and Lawrence H. Keith. Compilation of EPA's Sampling and Analysis Methods. 2nd ed. Boca Raton: CRC/Lewis Publishers, 1996.
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