APA (7th ed.) Citation

Ledru, P., Siman, P., Jacko, S., & Bezák, V. 3. Structure and development of the Hercynian orogen.

Chicago Style (17th ed.) Citation

Ledru, Patrick, Pavol Siman, Stanislav Jacko, and Vladimír Bezák. 3. Structure and Development of the Hercynian Orogen.

MLA (9th ed.) Citation

Ledru, Patrick, et al. 3. Structure and Development of the Hercynian Orogen.

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