Persell, Caroline Hodges, author
Harper & Row, 1984
Buku Teks
Merrill, Francis E. (Francis Ellsworth), 1904-1969, author
Prentice-Hall, 1965
Buku Teks
Chinoy, Ely
Randon House, 1967
Buku Teks
Chinoy, Ely
Random House, 1962
Buku Teks
Chinoy, Ely
Random House, 1961
Buku Teks