Gibbs, John C., author
Prentice-Hall, 1982
Buku Teks
Midgley, James, author
[publisher not identified], [date of publication not identified]
Buku Teks
Buku Teks
Pusic, Eugen
Mouton, 1972
Buku Teks
Herdi Sahrasad, author
Faculty of Humanities University of Indonesia, 2019
Artikel Jurnal