Baber, Ray E.
McGraw-Hill, 1953
Buku Teks
Fitra Nurjaman, authir
2015
UI - Tesis Membership
Goodsell, Willystine
Appleton-Century, 1936
Buku Teks
David Levinson, editor in chief
Simon & Schuster Macmillan, 1995
Buku Referensi
David Levinson, editor in chief
Simon & Schuster Macmillan, 1995
Buku Referensi