Parker, G.J.
Linguistic Circle of Canberra, 1970
Buku Teks
compiled by Howard P. McKaughan, Batua A. Macaraya
University of Hawaii Press, 1967
Buku Referensi
Palmer, E.H.
Routledge & Kegan Paul, 1956
Buku Referensi
Wehr, Hans, 1909-1981
Spoken Language Services, 1976
Buku Referensi
Lanyon-Orgill, Peter A.
Luzac & Co., 1944
Buku Referensi