Trines, G.H., author
Uitgeverts-Maatschappij, 1948
Buku Teks
Foster, Jack Stroud, author
Batsford, 1993
Buku Teks
Foster, Jack Stroud, author
Batsford, 1990
Buku Teks
Hart, Gary C., author
Prentice-Hall, 1982
Buku Teks
Fischer, Robert E., author
McGraw-Hill , 1964
Buku Teks