Cohen, M., & Bodeker, G. (2008). Understanding the global spa industry: Spa management. Butterworth-Heimann.
Lua i Stíl Chicago (17ú heag.)Cohen, Marc, agus Gerard Bodeker. Understanding the Global Spa Industry: Spa Management. Amsterdam: Butterworth-Heimann, 2008.
Lua MLA (9ú heag.)Cohen, Marc, agus Gerard Bodeker. Understanding the Global Spa Industry: Spa Management. Butterworth-Heimann, 2008.
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