Gheyselinck, R. (1937). Permian trilobites from Timor and Sicily: With a revision of their nomenclature and classification. Scheltema & Holkema.
Chicago-Zitierstil (17. Ausg.)Gheyselinck, Roger. Permian Trilobites from Timor and Sicily: With a Revision of Their Nomenclature and Classification. Amsterdam: Scheltema & Holkema, 1937.
MLA-Zitierstil (9. Ausg.)Gheyselinck, Roger. Permian Trilobites from Timor and Sicily: With a Revision of Their Nomenclature and Classification. Scheltema & Holkema, 1937.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.