Hansen, Karen, author
John Wiley & Sons, 2011
Buku Teks
editor, Frederick S. Merritt
McGraw-Hill, 1968
Buku Referensi
Vazirani, V.N., author
Khana Publishers, 1980
Buku Referensi
Merritt, Frederick S., author
McGraw-Hill , 1976
Buku Referensi
editors, Jonathan T. Ricketts, M. Kent Loftin, Frederick S. Merritt
McGraw-Hill, 2003
Buku Referensi