APA (7e ed.) Bronvermelding

Não informado. (2008). School bell. National School Public Relations Association.

Chicago (17e ed.) Bronvermelding

Não informado. School Bell. Washington: National School Public Relations Association, 2008.

MLA (8e ed.) Bronvermelding

Não informado. School Bell. National School Public Relations Association, 2008.

Let op: Deze citaties zijn niet altijd 100% accuraat.