| APA | GTFS. (2012, February 17). In Acronym Geek. Retrieved 08:08, February 17, 2012, from http://www.acronymgeek.com/GTFS |
| MLA | "GTFS." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/GTFS>. |
| MHRA | 'GTFS', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/GTFS> [accessed 17 February 2012] |
| Chicago | "GTFS", http://www.acronymgeek.com/GTFS (accessed February 17, 2012). |
| CBE/CSE | GTFS [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/GTFS. |
| Bluebook | GTFS, http://www.acronymgeek.com/GTFS (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GTFS, http://www.acronymgeek.com/GTFS (optional description here) (as of Feb. 17, 2012, 08:08). |
| AMA | GTFS. Acronym Geek. February 17, 2012, 08:08. Available at: http://www.acronymgeek.com/GTFS. Accessed February 17, 2012, 08:08. |