| APA | HTPH. (2012, February 12). In Acronym Geek. Retrieved 12:51, February 12, 2012, from http://www.acronymgeek.com/HTPH |
| MLA | "HTPH." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/HTPH>. |
| MHRA | 'HTPH', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/HTPH> [accessed 12 February 2012] |
| Chicago | "HTPH", http://www.acronymgeek.com/HTPH (accessed February 12, 2012). |
| CBE/CSE | HTPH [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/HTPH. |
| Bluebook | HTPH, http://www.acronymgeek.com/HTPH (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HTPH, http://www.acronymgeek.com/HTPH (optional description here) (as of Feb. 12, 2012, 12:51). |
| AMA | HTPH. Acronym Geek. February 12, 2012, 12:51. Available at: http://www.acronymgeek.com/HTPH. Accessed February 12, 2012, 12:51. |