<Table> <Tr> <Th_colspan="2"> "I'd Like to Teach the World to Sing (In Perfect Harmony)" </Th> </Tr> <Tr> <Th_colspan="2"> Single by The Hillside Singers </Th> </Tr> <Tr> <Th_colspan="2"> from the album I'd Like to Teach the World to Sing </Th> </Tr> <Tr> <Th> B - side </Th> <Td> "I Believed It All" </Td> </Tr> <Tr> <Th> Released </Th> <Td> November 1971 </Td> </Tr> <Tr> <Th> Label </Th> <Td> Metromedia </Td> </Tr> <Tr> <Th> Songwriter (s) </Th> <Td> <Ul> <Li> Bill Backer </Li> <Li> Billy Davis </Li> <Li> Roger Cook </Li> <Li> Roger Greenaway </Li> </Ul> </Td> </Tr> <Tr> <Th> Producer (s) </Th> <Td> Al Ham </Td> </Tr> </Table> <Tr> <Th_colspan="2"> "I'd Like to Teach the World to Sing (In Perfect Harmony)" </Th> </Tr>

Who wrote the song i d like to teach the world to sing in perfect harmony