Schmitz, Carl A.
Mouton & Co. Publishers, 1963
Buku Teks
Forrest, Thomas
Oxford University Press, 1969
Buku Teks
Woolford, Donald Mark
University of Queensland Press, 1976
Buku Teks
Hogbin, Herbert Ian
Routledge and Kegan Paul, 1951
Buku Teks
van der Veur, Paul W.
Australian National University Press, 1966
Buku Teks