Wambalaba, Francis W; Wambalaba, Akosa E; Sikalieh, Damary(Investment Climate and Business Environment Research Fund (ICBE-RF) / United States International University - Africa, 2012)
Wambalaba, Francis W; Muniafu, Maina; Nduati, Gidraph; Wanyama, Walter; Ndirangu, Dalton; Wambalaba, Akosa E(United States International University - Africa, 2009)