Cita APA (7a ed.)

Kaplan, U., Kennedy, W., Lehmann, J., & Marcinowski, R. (1998). Stratigraphy and ammonite fauna of the Cenomanian of Westphalia.

Cita Chicago Style (17a ed.)

Kaplan, U., W. Kennedy, J. Lehmann, y R. Marcinowski. Stratigraphy and Ammonite Fauna of the Cenomanian of Westphalia. 1998.

Cita MLA (9a ed.)

Kaplan, U., et al. Stratigraphy and Ammonite Fauna of the Cenomanian of Westphalia. 1998.