Zaborski, P. M. (1987). Lower Turonian (Cretaceous) ammonites from south-east Nigeria.
Chicago-Zitierstil (17. Ausg.)Zaborski, P. M. Lower Turonian (Cretaceous) Ammonites from South-east Nigeria. London, 1987.
MLA-Zitierstil (9. Ausg.)Zaborski, P. M. Lower Turonian (Cretaceous) Ammonites from South-east Nigeria. 1987.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.