Martin, Michael Rheta, author
The Bobbs Merrill, 1968
Buku Referensi
Morris, Richard B., author
Harper & Row, 1961
Buku Teks
edited by Richard B. Morris
Harper and Row , 1965
Buku Referensi
Mary Kupiec Cayton, Elliott J. Gorn, Peter W. Williams, editors
Charles Scribner's Sons, 1993
Buku Referensi
Mary Kupiec Cayton, Elliott J. Gorn, Peter W. Williams, editors
Charles Scribner's Sons, 1993
Buku Referensi