APA-Zitierstil (7. Ausg.)

Purvis, O. W., Coppins, B. J., & James, P. W. (1993). Checklist of lichens of Great Britain and Ireland (Completed March 1993.). British Lichen Society.

Chicago-Zitierstil (17. Ausg.)

Purvis, O. W., Brian John Coppins, und Peter W. James. Checklist of Lichens of Great Britain and Ireland. Completed March 1993. London: British Lichen Society, 1993.

MLA-Zitierstil (9. Ausg.)

Purvis, O. W., et al. Checklist of Lichens of Great Britain and Ireland. Completed March 1993. British Lichen Society, 1993.