Silverthorn, Dee Unglaub, author
Prentice-Hall, 2001
Buku Teks
Silverthorn, Dee Unglaub, author
Pearson, 2016
Buku Teks
Silverthorn, Dee Unglaub, author
Prentice-Hall, 2001
Buku Teks
Shier, David, author
McGraw-HIll. , 2001
Buku Teks
Moffett, David F., author
Mosby, 1993
Buku Referensi