Hi Paul, hope your well, and my former colleagues at WSU. For what it's worth, I used the following format in one of my papers with Peter Cornish, published in :
APHA (2005) Standard methods for the examination of water and waste water, 21st edn. American Public Health Association, Washington, DC
I don't recall any comments about this wording, but obviously it's generic, not specific to a particular method.
Search for the Method in Standard Methods Website https://www.standardmethods.org/ then you will get Suggested Citation on the Right Side Panel. Example of Citation for Method 2540 and 2710 are as follows. Note the Difference in DOI. ScreenShot of Website is Attached.
“2540 SOLIDS (2017)”, Standard Methods For the Examination of Water and Wastewater
DOI: 10.2105/SMWW.2882.030
“2710 TESTS ON SLUDGES (2017)”, Standard Methods For the Examination of Water and Wastewater
In my opinion, while citing any method from APHA, method number should be mentioned else it will be understood that you have cited the whole series of Standard Methods.
It's a late response, but I figured it now after struggling with the same challenge. How citing this book is dependent on the edition, assuming 2012 for now. It is generally accepted to cite this book as "APHA, 2012" in the text, although there are two more contributors/authors: AWWA, WEF. The editors are:
Rice, Eugene W.
Baird, a B.
Eaton, Andrew D.
Clesceri, Lenore S.
For the bibliography, it depends on which style you are using. These are other details you should input on Mendeley:
Baird, R., & Bridgewater, L. (2017). Standard methods for the examination of water and wastewater. 23rd edition. Washington, D.C.: American Public Health Association.