Skoog, D. A., Holler, F. J., Nieman, T. A., Holler, J., Nieman, T., Holler, F. J., & Holler, J. F. (1998). Principles of instrumental analysis (5th ed.). Philadelphia : Orlando, Fla.: Saunders College Pub. ; Harcourt Brace College Publishers.

Skoog, Douglas A., F. James Holler, Timothy A. Nieman, James Holler, Timothy Nieman, F. James Holler, and James F. Holler. Principles of Instrumental Analysis. 5th ed. Philadelphia : Orlando, Fla.: Saunders College Pub. ; Harcourt Brace College Publishers, 1998.

Skoog, Douglas A., et al. Principles of Instrumental Analysis. 5th ed. Philadelphia : Orlando, Fla.: Saunders College Pub. ; Harcourt Brace College Publishers, 1998.