Oldham, Frances K., author
J.B. Lippincott Company, 1960
Buku Teks
edited by John A. Bevan
Harper & Row, 1976
Buku Teks
Wilson, Andrew, author
Brown, 1968
Buku Teks
Hitner, Henry, author
McGraw-Hill, 1999
Buku Teks
Bowman, W.C., author
Blackwell, 1980
Buku Teks