W.Van Hoeve, 1969
Buku Teks
Fuchs, Stephen
Asia Publishing House, 1963
Buku Teks
Brown, John N. A.
Springer International Publishing , 2016
eBooks
Brouwer, Martinus Antonius Wesselinus, 1923-
Alumni, 1984
Buku Teks
Jackson, Peter
Routledge, 1995
Buku Teks