Schwartz, Bernard
Pitman, 1950
Buku Teks
Pound, Roscoe
University of Pitsburgh Press, 1942
Buku Teks
Robinson, Glen O.
West Publishing, 1974
Buku Teks
Robinson, Glen O.
West Publishing, 1986
Buku Teks
Lorch, Robert S.
Wayne State University Press, 1969
Buku Teks