Ngwa, J. A. (1971). An outline geography of the Federal Republic of Cameroon (Reprinted.). Longman.
Citazione stile Chigago Style (17a edizione)Ngwa, J. A. An Outline Geography of the Federal Republic of Cameroon. Reprinted. London: Longman, 1971.
Citatione MLA (9a ed.)Ngwa, J. A. An Outline Geography of the Federal Republic of Cameroon. Reprinted. Longman, 1971.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.