Albright, Madeleine, author
Marimax Books, 2003
Buku Teks
edited by Don K. Price
Prentice-Hall, 1960
Buku Teks
Hoban, Yvonne
McGraw-Hill, 1988
Buku Teks
Bredow, Miriam, author
Gregg Publishing, 1959
Buku Referensi
Becker, Esther R., author
Harper & Row, 1971
Buku Referensi