Byrt, W.J.
McGraw-Hill Book, 1972
Buku Teks
Roucek, Joseph S., author
Thomas Y. Crowell Company, 1950
Buku Teks
University of Queensland Press , 1975
Buku Teks
Warburton, Nigel, 1962-, author
Routledge, 2000
Buku Teks
by by S.R. Davis ... [et al.]
Angus and Robertson, 1954
Buku Teks