| APA | PTC1. (2012, February 12). In Acronym Geek. Retrieved 04:12, February 12, 2012, from http://www.acronymgeek.com/PTC1 |
| MLA | "PTC1." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/PTC1>. |
| MHRA | 'PTC1', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/PTC1> [accessed 12 February 2012] |
| Chicago | "PTC1", http://www.acronymgeek.com/PTC1 (accessed February 12, 2012). |
| CBE/CSE | PTC1 [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/PTC1. |
| Bluebook | PTC1, http://www.acronymgeek.com/PTC1 (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PTC1, http://www.acronymgeek.com/PTC1 (optional description here) (as of Feb. 12, 2012, 04:12). |
| AMA | PTC1. Acronym Geek. February 12, 2012, 04:12. Available at: http://www.acronymgeek.com/PTC1. Accessed February 12, 2012, 04:12. |