| APA | GSPF. (2012, February 14). In Acronym Geek. Retrieved 23:18, February 14, 2012, from http://www.acronymgeek.com/GSPF |
| MLA | "GSPF." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/GSPF>. |
| MHRA | 'GSPF', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/GSPF> [accessed 14 February 2012] |
| Chicago | "GSPF", http://www.acronymgeek.com/GSPF (accessed February 14, 2012). |
| CBE/CSE | GSPF [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/GSPF. |
| Bluebook | GSPF, http://www.acronymgeek.com/GSPF (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GSPF, http://www.acronymgeek.com/GSPF (optional description here) (as of Feb. 14, 2012, 23:18). |
| AMA | GSPF. Acronym Geek. February 14, 2012, 23:18. Available at: http://www.acronymgeek.com/GSPF. Accessed February 14, 2012, 23:18. |