DeCoursey, Rusell Myles, author
McGraw-Hill, 1980
Buku Teks
Silverthorn, Dee Unglaub, author
Pearson, Benjamin Cummings, 2010
Buku Teks
Shier, David, author
McGraw-Hill, 2004
Buku Teks
Shier, David, author
McGraw-HIll. , 2001
Buku Teks
Luciano, Dorothy S., author
McGraw-Hill , 1978
Buku Teks