APA citáció

Kulchytska G & Pavlyshyn V. (2003). Opal varieties in Carpathian volcanic rocks. Szeged.

Chicago Style (17th ed.) Citation

Kulchytska G and Pavlyshyn V. Opal Varieties in Carpathian Volcanic Rocks. Department of Mineralogy, Geochemistry and Petrology, University of Szeged: Szeged, 2003.

MLA idézés

Kulchytska G and Pavlyshyn V. Opal Varieties in Carpathian Volcanic Rocks. Szeged, 2003.