Ukene, D., & Barbero, A. S. (2014). Planning for Recreational Activities in Calabar City Centre. Obafemi Awolowo University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUkene, Daniel, और A. S. Barbero. Planning for Recreational Activities in Calabar City Centre. Obafemi Awolowo University, 2014.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUkene, Daniel, और A. S. Barbero. Planning for Recreational Activities in Calabar City Centre. Obafemi Awolowo University, 2014.
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