Mitchell, Richard H., author
Princeton University Press, 1983
Buku Teks
Buck, Pearl S. (Pearl Sydenstricker), 1892-1973, author
Gramedia Pustaka Utama, 2008
Buku Teks
Green, John Richard
New York The Co-operative Publication Society [t.th.]
Buku Teks
Rose, Richard, 1933-, author
Scott, Foreman, 1989
Buku Teks
Cash, Allen J., author
The Automobile Association, 1987
Buku Referensi