Fuentevilla, J. D. (2001). The eighty-twenty cluster: Not strategy. U.P. in Mindanao.
Lua i Stíl Chicago (17ú heag.)Fuentevilla, Jessie D. The Eighty-twenty Cluster: Not Strategy. Davao City: U.P. in Mindanao, 2001.
Lua MLA (9ú heag.)Fuentevilla, Jessie D. The Eighty-twenty Cluster: Not Strategy. U.P. in Mindanao, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.