McBride, John
20 (Twenty) Steps to better management
BBC Books , 1996
Buku Teks
Magic foods for better blood sugar
Marianne Wait, editor
Reader's Digest, 2007
Buku Teks
Ziglar, Zig
Steps to the top
Heinemann Asia, 1995
Buku Teks
tevis, Walter
The Steps of the sun
Doubleday, , 1983
Buku Teks
Walker, Peter
In the steps of Jesus
Kanisius, 2010
Buku Referensi