APA (7th ed.) Citation

Marriott, R. W., & Marriott, D. K. (1988). Vertigo modesta, a snail new to the British Isles. Zenodo.

Chicago Style (17th ed.) Citation

Marriott, Richard W., and Dorothy K. Marriott. Vertigo Modesta, a Snail New to the British Isles. Zenodo, 1988.

MLA (9th ed.) Citation

Marriott, Richard W., and Dorothy K. Marriott. Vertigo Modesta, a Snail New to the British Isles. Zenodo, 1988.

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