| APA | CH PPD. (2012, February 10). In Acronym Geek. Retrieved 13:56, February 10, 2012, from http://www.acronymgeek.com/CH PPD |
| MLA | "CH PPD." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/CH PPD>. |
| MHRA | 'CH PPD', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/CH PPD> [accessed 10 February 2012] |
| Chicago | "CH PPD", http://www.acronymgeek.com/CH PPD (accessed February 10, 2012). |
| CBE/CSE | CH PPD [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/CH PPD. |
| Bluebook | CH PPD, http://www.acronymgeek.com/CH PPD (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CH PPD, http://www.acronymgeek.com/CH PPD (optional description here) (as of Feb. 10, 2012, 13:56). |
| AMA | CH PPD. Acronym Geek. February 10, 2012, 13:56. Available at: http://www.acronymgeek.com/CH PPD. Accessed February 10, 2012, 13:56. |