Cita APA (7a ed.)

Hammer, C. U. (2003). GRIP Depth Age by Stratigraphy. PANGAEA.

Cita Chicago Style (17a ed.)

Hammer, C U. GRIP Depth Age by Stratigraphy. PANGAEA, 2003.

Cita MLA (9a ed.)

Hammer, C U. GRIP Depth Age by Stratigraphy. PANGAEA, 2003.