Laski, Harold J., author
MCML Yayasan Pembangunan, 1950
Buku Teks
Friedmann, Wolfgang, 1907-1972, author
Vorkonk-Van Hoeve, 1976
Buku Teks
Soltau, Roger H.
Longmans, Green , 1951
Buku Teks
Soltau, Roger H.
Longmans, Green , 1960
Buku Teks
Rodee, Carlton Clymer, author
RajaGrafindo Press, 2000
Buku Teks