South Africa. Dept. of National Health and Population Development. (1987). Workbook on smoking: Standards 3-7. Dept. of National Health and Population Development.
Chicago-referens (17:e uppl.)South Africa. Dept. of National Health and Population Development. Workbook on Smoking: Standards 3-7. [Pretoria]: Dept. of National Health and Population Development, 1987.
MLA-referens (8:e uppl.)South Africa. Dept. of National Health and Population Development. Workbook on Smoking: Standards 3-7. Dept. of National Health and Population Development, 1987.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.