Where can I find hardware to anchor my bookcases to the wall for safety?

I have 2 (tall and narrow yet very heavy) bookcases just moved to an area with extra thick carpet padding. They easily tilt back and forth with ease. I need to anchor them to the wall but how? I take it that I will need to screw conecting hardware in to the wall and bookshelves, but I do not know how to and with what hardware. Please help I do not want my kids and/or pets to get crushed accidentally!

Answers:
If you can attach them to studs within the walls, lag screws and washers will work best. If you can not attach to the studs you will need to use a molly bolt. Lowes has the best selection for different wall and application types.

Other answers:
I would seriously go to a hardware store because man, if they can't help you, something is wrong.
I would seriously go to a hardware store because man, if they can't help you, something is wrong.
Go to Lowes or Home Depot and get L brackets. They ae cheap and easy to install. Walmart or any hardware store will also have these.
I agree with your first person who answered this question. Go into a hardware store and tell them what you want to anchor and they will direct you to the proper materials.
If u go to a plumbing store, or Lowe's ,or HOME DEPOT, u can use that metallic "tape". It's alot like a roll of tape but it has lg& sm. holes. attach to b-case in an inconspicuous spot w/ screws, then to the wall(hopefully in a stud.)I believe plumbers call it plumbers tape, sometimes better than "L" brackets.
Any hardware store, like Home Depot
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