APA (7th ed.) Citation

Hammen, L. v. d. Studies on Opilioacarida, Arachnida. Brill.

Chicago Style (17th ed.) Citation

Hammen, Leendert van der. Studies on Opilioacarida, Arachnida. Leiden: Brill.

MLA (9th ed.) Citation

Hammen, Leendert van der. Studies on Opilioacarida, Arachnida. Brill.

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