Ziamur Rayhan
Ragam Tawa Bahasa Jepang dalam Manga The Promised Neverland = Varieties of Laughter in The Promised Neverland Manga
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2021
 UI - Tugas Akhir
Muhadjir
Persebaran Penutur Dan Variasi Bahasa Melayu
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 1992
 UI - Laporan Penelitian
Spirkin, A.G.
The origin of language
[publisher not identified], [date of publication not identified]
 Buku Teks SO
Hazen, Kirk
An introduction to language
Massachusetts : Wiley Blackwell, 2015
 Buku Teks SO
Hughes, John P.
The science of language: an introduction to linguistics
Random House, 1966
 Buku Teks SO