APA (7th ed.) Citation

(2015). National park system: What do the different park titles signify? Congressional Research Service.

Chicago Style (17th ed.) Citation

National Park System: What Do the Different Park Titles Signify? [Washington, District of Columbia]: Congressional Research Service, 2015.

MLA (9th ed.) Citation

National Park System: What Do the Different Park Titles Signify? Congressional Research Service, 2015.

Warning: These citations may not always be 100% accurate.