APA Citation

Howorth, P. J., & Hirst, A. D. (1975). Letter: SI units, pH and cH+.

Citação norma Chicago

Howorth, P J., and A D. Hirst. Letter: SI Units, PH and CH+. 1975.

MLA Citation

Howorth, P J., and A D. Hirst. Letter: SI Units, PH and CH+. 1975.

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