Harris, Marvin, 1927-2001, author
Harper Collins , 1991
Buku Teks
Nanda, Serena
Wadsworth, 1994
Buku Teks
Murphy, Robert F., author
Prentice-Hall, 1986
Buku Teks
Lenkeit, Roberta Edwards, author
McGraw-Hill, 2012
Buku Teks
Alfred A. Knopf, 1951
Buku Teks