| APA | H2S. (2012, February 14). In Acronym Geek. Retrieved 02:03, February 14, 2012, from http://www.acronymgeek.com/H2S |
| MLA | "H2S." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/H2S>. |
| MHRA | 'H2S', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/H2S> [accessed 14 February 2012] |
| Chicago | "H2S", http://www.acronymgeek.com/H2S (accessed February 14, 2012). |
| CBE/CSE | H2S [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/H2S. |
| Bluebook | H2S, http://www.acronymgeek.com/H2S (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, H2S, http://www.acronymgeek.com/H2S (optional description here) (as of Feb. 14, 2012, 02:03). |
| AMA | H2S. Acronym Geek. February 14, 2012, 02:03. Available at: http://www.acronymgeek.com/H2S. Accessed February 14, 2012, 02:03. |