Cita APA (7th ed.)
Gray, J. M. (2014). Geodiversity: Valuing and conserving abiotic nature (2e.). John Wiley & Sons Inc..
Cita Chicago (17th ed.)
Gray, J. M. Geodiversity: Valuing and Conserving Abiotic Nature. 2e. Chichester, West Sussex, UK: John Wiley & Sons Inc., 2014.
Cita MLA (9th ed.)
Gray, J. M. Geodiversity: Valuing and Conserving Abiotic Nature. 2e. John Wiley & Sons Inc., 2014.
Atenció: Aquestes cites poden no estar 100% correctes.