Não informado. Planning: A broadsheet issued by PEP. Political and Economic Planning.
Chicago-referens (17:e uppl.)Não informado. Planning: A Broadsheet Issued by PEP. London: Political and Economic Planning.
MLA-referens (8:e uppl.)Não informado. Planning: A Broadsheet Issued by PEP. Political and Economic Planning.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.