Williams, Norma
Tiger Books International, 1990
Buku Referensi
Aron, Elisabeth A.
Lippincott Williams & Wilkins, 2002
Buku Teks
edited by Brenna H. Mayer
lippincott Willims & Wilkins, 2005
Buku Teks
edited by Armand M. Nicholi
The Belknap Press of Harvard University Press, 1999
Buku Teks
Oscar Handlin ... [et.al] author
Belknap Press, 1963
Buku Teks