Eyo Ekpo, Bakker Dirk Photographer, Binns, B., Krichbaum Rollyn O., & Willett Frank. (1980). Treasures of ancient nigeria (First edition.). Alfred A. Knopf.
Chicago Style (17th ed.) ZitazioaEyo Ekpo, Bakker Dirk Photographer, Betty Binns, Krichbaum Rollyn O., eta Willett Frank. Treasures of Ancient Nigeria. First edition. New York: Alfred A. Knopf, 1980.
MLA (9th ed.) ZitazioaEyo Ekpo, et al. Treasures of Ancient Nigeria. First edition. Alfred A. Knopf, 1980.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.