| APA | PET. (2012, February 8). In Acronym Geek. Retrieved 12:00, February 8, 2012, from http://www.acronymgeek.com/PET |
| MLA | "PET." Acronym Geek. (2012). Acronym Geek. 8 Feb 2012 <http://www.acronymgeek.com/PET>. |
| MHRA | 'PET', Acronym Geek, 8 February 2012, <http://www.acronymgeek.com/PET> [accessed 8 February 2012] |
| Chicago | "PET", http://www.acronymgeek.com/PET (accessed February 8, 2012). |
| CBE/CSE | PET [Internet]. Acronym Geek; 2012 Feb 8 [cited 2012 Feb 8]. Available from: http://www.acronymgeek.com/PET. |
| Bluebook | PET, http://www.acronymgeek.com/PET (last visited February 8, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PET, http://www.acronymgeek.com/PET (optional description here) (as of Feb. 8, 2012, 12:00). |
| AMA | PET. Acronym Geek. February 8, 2012, 12:00. Available at: http://www.acronymgeek.com/PET. Accessed February 8, 2012, 12:00. |