Rogers, Katherine M
Harvester Wheatsheaf, 1990
Buku Teks
Oldham, Frances K., author
J.B. Lippincott Company, 1960
Buku Teks
Tappan, Frances M.
Reston Publishing, 1980
Buku Teks
Gaudiano, Frances J. M, author
Elsevier, 2005
Buku Teks
George Philip Limited, 1999
Buku Referensi