Παραπομπή σε μορφή APA (7η εκδ.)

(1995). Earth science software directory: A comprehensive directory of computer software related to the earth sciences (7th ed.). Gibbs Associates.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Earth Science Software Directory: A Comprehensive Directory of Computer Software Related to the Earth Sciences. 7th ed. Colorado: Gibbs Associates, 1995.

Παραπομπή σε μορφή MLA (8th εκδ.)

Earth Science Software Directory: A Comprehensive Directory of Computer Software Related to the Earth Sciences. 7th ed. Gibbs Associates, 1995.