Não informado. Physical Recreation. Central Council of Physical Recreation.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Physical Recreation. London: Central Council of Physical Recreation.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Physical Recreation. Central Council of Physical Recreation.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.