Cita APA (7th ed.)
POTTER, P. E. Introductory Petrography of fossils.
Cita Chicago (17th ed.)
POTTER, Paul Edwin. Introductory Petrography of Fossils.
Cita MLA (9th ed.)
POTTER, Paul Edwin. Introductory Petrography of Fossils.
Atenció: Aquestes cites poden no estar 100% correctes.