World Health Organization. (2009). Systems thinking for health systems strengthening. World health Organization.
Chicago-Zitierstil (17. Ausg.)World Health Organization. Systems Thinking for Health Systems Strengthening. Geneva: World health Organization, 2009.
MLA-Zitierstil (8. Ausg.)World Health Organization. Systems Thinking for Health Systems Strengthening. World health Organization, 2009.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.