| Ety |
The Etymologies in The Lost Road and Other Writings, 1987. |
| H |
The Hobbit. |
| HL |
Hiswelókë (fanzine), 1999–2001. |
| LB |
The Lays of Beleriand, 1985. |
| LR |
The Lost Road and Other Writings, 1987. |
| Lamb |
Lambengolmor mailing-list, 2002–2020. |
| Letters |
The Letters of J.R.R. Tolkien, 1981. |
| LotR |
The Lord of the Rings. |
| MC |
The Monsters and the Critics, 1983. |
| MR |
Morgoth’s Ring, 1993. |
| NM |
The Nature of Middle-earth, 2021. |
| PE |
Parma Eldalamberon (series). |
| PM |
The Peoples of Middle-earth, 1996. |
| RC |
The Lord of the Rings: a Reader’s Companion, 2005. |
| RGEO |
The Road Goes Ever On, 1967. |
| RS |
The Return of the Shadow, 1988. |
| S |
The Silmarillion, 1977. |
| SD |
Sauron Defeated, 1992. |
| Sindict |
Sindict mailing-list, 2002–2011. |
| TAI |
J.R.R. Tolkien: Artist and Illustrator, 1995. |
| TC |
A Tolkien Compass (first ed.), 1975. |
| TI |
The Treason of Isengard, 1989. |
| TS |
Tolkien Studies (series). |
| TT |
Tyalië Tyelelliéva (fanzine), 1994–2001. |
| Tengwestie |
Tengwestië (online journal). |
| UT |
Unfinished Tales of Númenor and Middle-earth, 1980. |
| VT |
Vinyar Tengwar (fanzine). |
| WJ |
The War of the Jewels, 1994. |
| WR |
The War of the Ring, 1990. |
| X |
Normalization rules. |