| APA | PTCI. (2012, February 16). In Acronym Geek. Retrieved 00:45, February 16, 2012, from http://www.acronymgeek.com/PTCI |
| MLA | "PTCI." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PTCI>. |
| MHRA | 'PTCI', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PTCI> [accessed 16 February 2012] |
| Chicago | "PTCI", http://www.acronymgeek.com/PTCI (accessed February 16, 2012). |
| CBE/CSE | PTCI [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PTCI. |
| Bluebook | PTCI, http://www.acronymgeek.com/PTCI (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PTCI, http://www.acronymgeek.com/PTCI (optional description here) (as of Feb. 16, 2012, 00:45). |
| AMA | PTCI. Acronym Geek. February 16, 2012, 00:45. Available at: http://www.acronymgeek.com/PTCI. Accessed February 16, 2012, 00:45. |