How to log off Apple account?

So I've lost my Iphone 4s (ios 7) and I want to sign out of my apple account on that phone. Is there an option somewhere to log off from other devices?

ITunes
1. Open iTunes. Find the menu at the top of your monitor window.
2. Select "Store" from the menu.
3. Point your mouse cursor to "Sign Out" and select. This will automatically sign you out. You will not be able to purchase any music or other items through iTunes until you sign back in. Online
4. Browse online for what you would like to purchase. Make any purchases.
5. Close out your browser. The Apple Store has no "Logout" button to select. When you close out of your browser, or log off of your computer, you will automatically be signed out. You can also navigate to another website.
6. Leave the Apple Store idle, alternatively to closing the browser. After several minutes, Apple will automatically sign you out. Even if the store still shows you as being signed in, after several minutes it will require you to re-enter your password to make any purchases.

If you want to completely sign out of an Apple ID on any iPhone running iOS 5.0 or higher, there's another half of the process. You will have to sign out of iCloud. To do this, you will open Settings -> iCloud and press delete account. It will give you the option to keep the info from the account, (I recommend this option) or to delete the info from the phone (may delete all contacts). You then can sign into another Apple ID and merge the info to the new account.

To log out of your Apple ID on your iPhone go into settings> Store> tap on your Apple ID and It will give you a list of options. You will be able to View it, Sign out, iForgot to change password, or cancel. If you choose sign out you will be able to sign in with another Apple ID.