Turnkring Volharding Boom. (2013). Nieuwsbrief Turnkring Volharding Boom. Boom: Turnkring Volharding Boom.
Lua i Stíl Chicago (17ú heag.)Turnkring Volharding Boom. Nieuwsbrief Turnkring Volharding Boom. Boom: Turnkring Volharding Boom, 2013.
Lua MLA (8ú heag.)Turnkring Volharding Boom. Nieuwsbrief Turnkring Volharding Boom. Boom: Turnkring Volharding Boom, 2013.
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