Cita APA

Decker, C. E. (1935). The Graptolites of the Simpson Group of Oklahoma.

Chicago Style Citation

Decker, Charles E. The Graptolites of the Simpson Group of Oklahoma. 1935.

Cita MLA

Decker, Charles E. The Graptolites of the Simpson Group of Oklahoma. 1935.

Atenció: Aquestes cites poden no estar 100% correctes.