Tandon H L S & Messick D L. (2002). Practical sulphur guide. The sulphur institute.
Chicago Edition CitationTandon H L S and Messick D L. Practical Sulphur Guide. Washington: The sulphur institute, 2002.
MLA Edition CitationTandon H L S and Messick D L. Practical Sulphur Guide. The sulphur institute, 2002.
Warning: These citations may not always be 100% accurate.