Cita APA (7th ed.)
Hegeler, S. Peter and caroline: A child asks about childbirth and sex (1a.ed.). Tavistock publications limited.
Cita Chicago (17th ed.)
Hegeler, Sten. Peter and Caroline: A Child Asks About Childbirth and Sex. 1a.ed. Londres: Tavistock publications limited.
Cita MLA (9th ed.)
Hegeler, Sten. Peter and Caroline: A Child Asks About Childbirth and Sex. 1a.ed. Tavistock publications limited.
Atenció: Aquestes cites poden no estar 100% correctes.