edited by S.A. Wurm and D.C. Laycock
Linguistic Circle of Canberra, 1970
Buku Klasik
Mees, C. A.
Oxford University Press, 1967
Buku Teks
edited by Daniel Abondolo
Routledge, 1998
Buku Teks
Psychology Press , 1999
Buku Teks SO
edited by Sanford B. Steever
Routledge, 1998
Buku Teks