APA引文

The United Nations at 50 notes for speakers. United Nations. Department of Public Information.

Chicago Style (17th ed.) Citation

The United Nations at 50 Notes for Speakers. United Nations. Department of Public Information.

MLA引文

The United Nations at 50 Notes for Speakers. United Nations. Department of Public Information.

警告：这些引文格式不一定是100％准确.