Calummaparsonii.com, calumma parsonii goggle and facebook searches, and searching the forum will lead you several articles on various subjects, relating to the keeping of parsonii. There is very minimal information about specifics, such as brands of supplements and frequency of dosage, bulb and lighting types, simulating brumation, watering, and the like.
Partially, keepers have to find what works for their animals. WC animals are different than CB animals, WC animals can come from areas of variable temperatures and rainfall, so some will want things a few degrees cooler or warmer, and many other factors change how a chameleon might respond to care in captivity.
I will tell you that WC animals are by far the hardest species I've worked with, in terms of getting them well settled. I worked with WC melleri and aside from infection, they settled much easier. CB animals are fairly easy, but this species is perhaps the most demanding of water. You want to provide several 30-90min misting sessions a week, for sure.
As majestic as they are, be aware they aren't the most entertaining of chameleons. The older they get, the more like pet rocks they become.
Be aware that a lot of the information online is from keeping practices in the early 90s and attitudes have changed about feeding vertebrate prey, the best medications to use, the diameter of perches, the use of preformed vitamin A supplements, and other aspects of care. You will find keepers here, that are more than willing to answer specific questions.