when i use CFRelease?

i'm studying iOS programming.

i wrote code that associated an address.

there's so many methods. like

i'm dividing a group.

here's group1

ABAddressBookCreate();
 ABRecordCopyCompositeName(argument);
 ABRecordCopyValue(argument1, argument2);
 ABRecordCopyValue(argument1, argument2);
 ABMultiValueCopyLabelAtIndex(argument1, argument2);
 ABMultiValueCopyValueAtIndex(argument1, argument2);
 

and another one is right here, group2

CFArrayGetCount(argument);
 CFArrayGetValueAtIndex(argument1, argument2);
 ABMultiValueGetCount(argument);
 

i know there's so many other methods.

but i wonder when i use CFRelease method.

i think group2's all methods don't do CFRelease

because that contain the word "Get", not allocated.

and i think group1's all method have to use CFRelease

because there's a string "copy".

i have a book.

but there's used CFRelease twice.

one is release ABAddressBookCreate()

another one is ABAddressBookCopyPeopleWithName.

all of other things don't use CFRelease.

so i wonder when i use CFRelease.

please tell me when i use CFRelease.

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