Cita APA (7a ed.)

Frey, W., Frahm, J., Fischer, E., Lobin, W., & Lünser, H. (2006). The liverworts, mosses and ferns of Europe (English edition.). Harley Books.

Cita Chicago Style (17a ed.)

Frey, Wolfgang, Jan-Peter Frahm, Eberhard Fischer, Wolfram Lobin, y H. Lünser. The Liverworts, Mosses and Ferns of Europe. English edition. Essex: Harley Books, 2006.

Cita MLA (9a ed.)

Frey, Wolfgang, et al. The Liverworts, Mosses and Ferns of Europe. English edition. Harley Books, 2006.