Ricklefs, Merle Calvin, 1943-
Serambi Ilmu Semesta, 2005
Buku Teks
Ricklefs, Merle Calvin, 1943-
Oxford University Press, 1977
Buku Referensi
Jones, Antoinette M. Barrett
Foris Publications, 1984.
Buku Teks
Adams Evan, author
Sonit Education Academy publication, 2016
Buku Teks
Butlin, S.J.
Australian War Memorial, 1955
Buku Teks