World Health Organization. (1996). Cancer pain relief: With a guide to opioid availability. Geneva: World Health Organization.
Trích dẫn kiểu ChicagoWorld Health Organization. Cancer Pain Relief: With a Guide to Opioid Availability. Geneva: World Health Organization, 1996.
MLA引文World Health Organization. Cancer Pain Relief: With a Guide to Opioid Availability. Geneva: World Health Organization, 1996.
警告:这些引文格式不一定是100%准确.