Olago, S. (1997). Breaking into the 21st century: A business guide for Kenyans. Covenant.
Lua i Stíl Chicago (17ú heag.)Olago, Sam. Breaking into the 21st Century: A Business Guide for Kenyans. Nairobi: Covenant, 1997.
Lua MLA (9ú heag.)Olago, Sam. Breaking into the 21st Century: A Business Guide for Kenyans. Covenant, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.