1. Go to payments.google.com, and log in with the account you wish to see the purchase history for

2. Select 'Transactions' and this will show you your purchase history

3. Selecting an item from the list should show you the receipt for that individual purchase

1. Open iTunes on your computer

2. Click 'Sign In', and then enter the Apple ID and password that you used to make the purchase

3. Click your name and select 'Account Info' from the menu

4. Enter your password again

5. Scroll down to 'Purchase History'

6. click 'See All'

Amazon
1. Go to the Amazon website       

2. Sign in with the account you wish to see the purchase history for              

3. Hover over the item in the menu that says, 'Hello...*your name*'

4. Click on 'Your Orders' from the list                                               

5. Click on 'Your Orders' on the newly opened page                

6. Enter your password again if prompted                                   

7. Your purchase history will now be displayed