APA引文

Survey, U. S. G. US Geological Survey circular. Washington, DC [u.a.].

Chicago Style Citation

Survey, United States Geological. US Geological Survey Circular. Washington, DC [u.a.].

MLA引文

Survey, United States Geological. US Geological Survey Circular. Washington, DC [u.a.].

警告：这些引文格式不一定是100％准确.