Ideologi Muhammad Bahauddin Amin Tentang Menjadi Orang yang Produktif

Gambar (Pixabay: Gerd Altmann/geralt)
Drucker, Peter F. (1966). The Effective Executive. New York : Harper & Row
Covey, Stephen R. (1989). The 7 Habits of Highly Effective People. New York : Free Press
Ferriss, T. (2007). The 4-Hour Workweek. New York : Crown Publishing Group
Djati, A. (2003). Metodologi Penelitian Kualitatif. Jakarta: PT. Raja Grafindo Persada.