Roucek, Joseph S., author
Thomas Y. Crowell Company, 1950
Buku Teks
Klesner, Joseph L., author
McGrawHill education, 2014
Buku Teks
Strong, C.F., author
Sidgwick & Jackson Limited, 1960
Buku Teks
Christian Soe
McGraw-Hill, 2004
Buku Teks
Barringron, Lowell, author
Wadsworth and Cengage Learning, 2013
Buku Teks