Utley, Rose A., author
Jones and Bartlett , 2011
Buku Teks
Helen L. Van Hoozer [and others]
Appleton Century Crofts, 1987
Buku Teks
Puetz, Belinda E., author
Aspen Publishers, 1981
Buku Teks
Bellings, Diane M., author
Saunders Elsevier, 2009
Buku Teks
Knowles, Malcolm S., author
Association Press, 1976
Buku Teks