| APA | 4PCH. (2012, February 15). In Acronym Geek. Retrieved 23:05, February 15, 2012, from http://www.acronymgeek.com/4PCH |
| MLA | "4PCH." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/4PCH>. |
| MHRA | '4PCH', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/4PCH> [accessed 15 February 2012] |
| Chicago | "4PCH", http://www.acronymgeek.com/4PCH (accessed February 15, 2012). |
| CBE/CSE | 4PCH [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/4PCH. |
| Bluebook | 4PCH, http://www.acronymgeek.com/4PCH (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 4PCH, http://www.acronymgeek.com/4PCH (optional description here) (as of Feb. 15, 2012, 23:05). |
| AMA | 4PCH. Acronym Geek. February 15, 2012, 23:05. Available at: http://www.acronymgeek.com/4PCH. Accessed February 15, 2012, 23:05. |