Chris Asanti, author
Fakultas Ilmu Budaya Universitas Mulawarman, 2017
Artikel Jurnal
Scharbach, Alexander, author
McGraw-Hill , 1965
Buku Teks
Artikel Jurnal
Turville-Petre, Thorlac, author
Blackwell Publishing, 2007
Buku Teks
edited by Peter Widdowson
Methuen , 1982
Buku Teks