| APA | PETM. (2012, February 15). In Acronym Geek. Retrieved 09:58, February 15, 2012, from http://www.acronymgeek.com/PETM |
| MLA | "PETM." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PETM>. |
| MHRA | 'PETM', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PETM> [accessed 15 February 2012] |
| Chicago | "PETM", http://www.acronymgeek.com/PETM (accessed February 15, 2012). |
| CBE/CSE | PETM [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PETM. |
| Bluebook | PETM, http://www.acronymgeek.com/PETM (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PETM, http://www.acronymgeek.com/PETM (optional description here) (as of Feb. 15, 2012, 09:58). |
| AMA | PETM. Acronym Geek. February 15, 2012, 09:58. Available at: http://www.acronymgeek.com/PETM. Accessed February 15, 2012, 09:58. |