APA (7e ed.) Bronvermelding

Hewitt, D. W. (1988). Longer Life, radiant health and dinamic living The easy way prevent cancer stroke heart attackes other diseases. Weimar.

Chicago (17e ed.) Bronvermelding

Hewitt, Donald W. Longer Life, Radiant Health and Dinamic Living The Easy Way Prevent Cancer Stroke Heart Attackes Other Diseases. Weimar, 1988.

MLA (9e ed.) Bronvermelding

Hewitt, Donald W. Longer Life, Radiant Health and Dinamic Living The Easy Way Prevent Cancer Stroke Heart Attackes Other Diseases. Weimar, 1988.