APA
Hess Hans; Messing Charles G & Ausich William I, . (2011). Treatise on invertebrate paleontology / Part L, Mollusca 4: (Revised). Volume 4, Cretaceous ammonoidea .-978-0-9833599-1-3. : Geological Society of America and The University of Kansas, USA, Kansas.
Chicago
Hess Hans; Messing Charles G & Ausich William I, . 2011. Treatise on invertebrate paleontology / Part L, Mollusca 4: (Revised). Volume 4, Cretaceous ammonoidea .-978-0-9833599-1-3. : Geological Society of America and The University of Kansas, USA, Kansas.
Harvard
Hess Hans; Messing Charles G & Ausich William I, . (2011). Treatise on invertebrate paleontology / Part L, Mollusca 4: (Revised). Volume 4, Cretaceous ammonoidea .-978-0-9833599-1-3. : Geological Society of America and The University of Kansas, USA, Kansas.
MLA
Hess Hans; Messing Charles G & Ausich William I, . Treatise on invertebrate paleontology / Part L, Mollusca 4: (Revised). Volume 4, Cretaceous ammonoidea .-978-0-9833599-1-3. : Geological Society of America and The University of Kansas, USA, Kansas. 2011.