Howard, Ebenezer
Faber and Faber, 1946
Buku Teks
Simonds, John Ormsbee, author
McGraw-Hill, 1994
Buku Teks
Simonds, John Ormsbee, author
McGraw-Hill , 1994
Buku Teks
Reina Restianti Amin, author
2014
UI - Skripsi (Membership)
Lestari Rahayu, author
Universitas Indonesia, 1997
UI - Laporan Penelitian