Partner

What resources/articles etc can I read or my partner read to help explain gentle parenting to my partner who doesn't seem open to the idea?

I am no expert on it, but when I try to explain I am met with "We are the parent not friends" And things like that.

My 6yo recently has decided they are only comfortable wearing long sleeve shirts and pants. My partner thought they should be "pushed" and made them try a tshirt saying they could change after if they want. I don't think they should have made them feel forced to wear anything they are not comfortable in. Big argument- having a hard time explaining my side! Help!