Ukene, D., & Barbero, A. S. (2014). Planning for Recreational Activities in Calabar City Centre. Obafemi Awolowo University.
Lua i Stíl Chicago (17ú heag.)Ukene, Daniel, agus A. S. Barbero. Planning for Recreational Activities in Calabar City Centre. Obafemi Awolowo University, 2014.
Lua MLA (9ú heag.)Ukene, Daniel, agus A. S. Barbero. Planning for Recreational Activities in Calabar City Centre. Obafemi Awolowo University, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.