| APA | 4PCL. (2012, February 17). In Acronym Geek. Retrieved 06:56, February 17, 2012, from http://www.acronymgeek.com/4PCL |
| MLA | "4PCL." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/4PCL>. |
| MHRA | '4PCL', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/4PCL> [accessed 17 February 2012] |
| Chicago | "4PCL", http://www.acronymgeek.com/4PCL (accessed February 17, 2012). |
| CBE/CSE | 4PCL [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/4PCL. |
| Bluebook | 4PCL, http://www.acronymgeek.com/4PCL (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 4PCL, http://www.acronymgeek.com/4PCL (optional description here) (as of Feb. 17, 2012, 06:56). |
| AMA | 4PCL. Acronym Geek. February 17, 2012, 06:56. Available at: http://www.acronymgeek.com/4PCL. Accessed February 17, 2012, 06:56. |