Asher, Herbert B., author
The Dorsey Press, 1980
Buku Teks
Stevenson, Augusta, author
Bobbs-Merrill, 1959
Buku Teks
Asher, Herbert B., author
The Dorsey Press, 1984
Buku Teks
Cunliffe, Marcus, author
A Mentor Books, 1963
Buku Teks
Cunliffe, Marcus, author
A Mentor Books, 1960
Buku Teks