Cohen, Felissa L.
J.b. Lippincott , 1984
Buku Teks
edited by Beverly J. Rambo, Lucile A. Wood
W.B. Saunders, 1982
Buku Teks
edited by Jeyanth Asheervath and Dorothy R. Blevins
Appleton-Century-Crofts, 1986.
Buku Referensi
Matloff, Ellen T.
Wolters Kluwer, 2013
Buku Teks
Carpenito-Moyet, Lynda Juall
J.B. Lippincott, 1983
Buku Teks