Brogan, D.W. [Denis William]
Harper & Brothers, 1957
Buku Teks SO
Fisher, H.A.L.
Thornton Butterwort, Limites, 1932
Buku Teks SO
Brogan, D.W. [Denis William]
Arrow Book, 1961
Buku Teks
Durant, Will
Simon and Schuster, 1953
Buku Teks SO
[Publisher not identified], [Date of publication not identified]
Naskah