Manson-Bahr, P.E.C.
Bailliere Tindall , 1982
Buku Teks
Mosby , 1985
Buku Teks
Miller, Martha J., author
Saunders , 1983
Buku Teks
Mulvihill, Mary Lou, author
Appletton & lange , 1991
Buku Teks
Smith, Theobald
Princeton University Press, 1934
Buku Teks