| APA | USGS. (2012, February 9). In Acronym Geek. Retrieved 21:26, February 9, 2012, from http://www.acronymgeek.com/USGS |
| MLA | "USGS." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/USGS>. |
| MHRA | 'USGS', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/USGS> [accessed 9 February 2012] |
| Chicago | "USGS", http://www.acronymgeek.com/USGS (accessed February 9, 2012). |
| CBE/CSE | USGS [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/USGS. |
| Bluebook | USGS, http://www.acronymgeek.com/USGS (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, USGS, http://www.acronymgeek.com/USGS (optional description here) (as of Feb. 9, 2012, 21:26). |
| AMA | USGS. Acronym Geek. February 9, 2012, 21:26. Available at: http://www.acronymgeek.com/USGS. Accessed February 9, 2012, 21:26. |