Cita APA (7a ed.)

Howarth, M. K. (1998). Ammonites and nautiloids fromt he Jurassic and Lower Cretaceous of Wadi hajar, southern Yemen. Zenodo.

Cita Chicago Style (17a ed.)

Howarth, Michael Kingsley. Ammonites and Nautiloids Fromt He Jurassic and Lower Cretaceous of Wadi Hajar, Southern Yemen. Zenodo, 1998.

Cita MLA (9a ed.)

Howarth, Michael Kingsley. Ammonites and Nautiloids Fromt He Jurassic and Lower Cretaceous of Wadi Hajar, Southern Yemen. Zenodo, 1998.