Schwartz, Bernard
Pitman, 1950
Buku Teks SO
Pound, Roscoe
University of Pitsburgh Press, 1942
Buku Teks SO
Robinson, Glen O.
West Publishing, 1986
Buku Teks
Robinson, Glen O.
West Publishing, 1974
Buku Teks SO
Robinson, Glen O.
West Publishing, 1974
Buku Teks SO