Hutagalung, Rory Anthony, author
Gramedia Pustaka Utama, 2003, 2003
Buku Teks
Nazarudin, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2005
UI - Skripsi (Membership)
Burriss, Eli E.
Prentice-Hall, 1958
Buku Teks
Pike, Kenneth L. (Kenneth Lee), 1912-2000, author
Summer Institute of Linguistics, 1957
Buku Klasik
Annisa Windiani Putri, author
2016
UI - Skripsi (Membership)