Rodee, Carlton Clymer, author
McGraw-Hill, 1983
Buku Teks
Shively, W. Phillips, 1942-, author
McGraw-Hill, 2011
Buku Teks
Ethridge, Marcus E., author
Wadsworth, 2010
Buku Teks
Lipson, Leslie, author
Prentice-Hall, 1954
Buku Teks
Ranney, Austin, author
Holt, Rinehart and Winston , 1958
Buku Teks