Jordan, Philip B., author
McGraw-Hill, 1969
Buku Referensi
Isihara, A., author
Oxford University Press, 1991
Buku Teks
Hawley, William
New Directions Books , 1951
Buku Teks
Free Press, 1979
Buku Teks
edited by G.W. Crabtree and P. Vashishta
North-Holland , 1982
Buku Teks