edited by Barbara Walton Spradley
J.B. Lippincott, 1997
Buku Teks
edited by Barbara Walton Spradley
J.B. Lippincott , 1991
Buku Teks
Clark, Mary Jo
Appleton & lange , 1999
Buku Teks
Smith, Claudia M.
W.B. Saunders , 2000
Buku Teks
Hitchcock, Janice E.
Delmar, 1999
Buku Teks SO