Cita APA (7th ed.)
UNESCO & . Tales set in stone: 40 years of the International Geoscience Programme (IGCP) (1.). UNESCO.
Cita Chicago (17th ed.)
UNESCO i. Tales Set in Stone: 40 Years of the International Geoscience Programme (IGCP). 1. UNESCO.
Cita MLA (9th ed.)
UNESCO i. Tales Set in Stone: 40 Years of the International Geoscience Programme (IGCP). 1. UNESCO.
Atenció: Aquestes cites poden no estar 100% correctes.