Caroll, Brian
The builders: Great Australian construction projects / Brian Carroll
Cassel Australia , 1981
 Buku Teks
Seeger, Bernhard
Herbstrauch roman / Bernhard Seeger
Mitteldeutscher,, 1962
 Buku Teks
Hendrik en Bernhard
Uitgeverij Lekturama, 1991
 Buku Referensi
Pearson, William
Chessplayer / William Pearson
The Viking Press, 1984
 Buku Teks
Pearson, Lorentz C.
Principles of agronomy / Lorentz C. Pearson
Reinhold Publishing Corporation, 1967
 Buku Teks