APA (7th ed.) Citation

Mortensen, T. H. (1977). Handbook of the echinoderms of the British Isles. Dr. W. Backhuys Uitgeve.

Chicago Style (17th ed.) Citation

Mortensen, T. H. Handbook of the Echinoderms of the British Isles. Rotterdam, Netherlands: Dr. W. Backhuys Uitgeve, 1977.

MLA (9th ed.) Citation

Mortensen, T. H. Handbook of the Echinoderms of the British Isles. Dr. W. Backhuys Uitgeve, 1977.