APA
Pr�ss-�st�n A., LeChevallier M. W., Covalan C., Au K. & World Health Organization. (2006). Preventing disease through healthy environments. Geneva, Switzerland: World Health Organization.
Chicago
Pr�ss-�st�n Annette, LeChevallier Mark W, Covalan C, Au Kwok-Keung and World Health Organization. 2006. Preventing disease through healthy environments. Geneva, Switzerland: World Health Organization.
Harvard
Pr�ss-�st�n A., LeChevallier M. W., Covalan C., Au K. and World Health Organization. (2006). Preventing disease through healthy environments. Geneva, Switzerland: World Health Organization.
MLA
Pr�ss-�st�n Annette, LeChevallier Mark W, Covalan C, Au Kwok-Keung and World Health Organization. Preventing disease through healthy environments. Geneva, Switzerland: World Health Organization. 2006.