De Leeuw, Hendrik
Hanover House, 1954
Buku Teks
Reid, Anthony, 1939-, author
John Wiley & Sons, 2015
Buku Teks
Cressey, George Babcock, 1896-1963, author
J.B. Lippincott, 1960
Buku Teks
Bequai, August
John Wiley , 1981
Buku Teks
Herrick, Neal Q., author
Jossey-Bass, 1990
Buku Teks