Schlenker, Eleanor D.
Elsevier Mosby, 2011
Buku Teks
Rolfes, Sharon Rady
Wadsworth and Cengage Learning, 2012
Buku Teks
Heimburger, Douglas C.
Mosby, Elsevier, 2006
Buku Referensi
Romeyn, Mary
Jossey-Bass , 1998
Buku Teks
Garrow, J.S.
Churchil Livingtone, 1996
Buku Teks