APA Style
et.al., ., Sparkman, O, D. (2011).
Gas chromatography and mass spectrometry : a practical guide (2nd).
Burlington, MA:
Academic Press.
MLA Style
et.al., ., Sparkman, O, David.
"Gas chromatography and mass spectrometry : a practical guide".
2nd
Burlington, MA:
Academic Press,
2011.
.