Citing tests and measures is not as cut and dry as citing other sources and may require you to use your best judgment. Remember, the main purpose of a citation is to allow others to find the test you are using.
There are some guidelines you can use, linked below. If you're still unsure about your citation, find papers that have cited that test and use their citation to build your own. If all else fails, contact the publisher and ask how they would prefer for their test to be cited.