APA (7th ed.) Citation

Hellēnikē Geologikē Hetaireia. (1991). Praktika.

Chicago Style (17th ed.) Citation

Hellēnikē Geologikē Hetaireia. Praktika. Thessaloniki, 1991.

MLA (9th ed.) Citation

Hellēnikē Geologikē Hetaireia. Praktika. 1991.

Warning: These citations may not always be 100% accurate.