Cita APA (7th ed.)

Marshall, A. (2007). Ethical challenges in study design and informed consent for health research in resource - poor settings. World Health organization.

Cita Chicago (17th ed.)

Marshall, A. Ethical Challenges in Study Design and Informed Consent for Health Research in Resource - Poor Settings. Geneva: World Health organization, 2007.

Cita MLA (8th ed.)

Marshall, A. Ethical Challenges in Study Design and Informed Consent for Health Research in Resource - Poor Settings. World Health organization, 2007.