Campanula

Campanulas: a gardener's guide

Peter Lewis and Margaret Lynch.

Dwarf Campanulas: And Associated Genera

Graham Nicholls

The garden of bellflowers in North America

by L. H. Bailey, with the assistance of G. H. M. Lawrence.

Campanulas: their cultivation and classification

by H. Clifford Crook.

Campanule d'Italia e dei territori limitrofi

Adriano Bernini, Giancarlo Marconi, Francesco Polani

Campanulas and bellflowers in cultivation.

H. Clifford Crook

Campanulas in the garden

Peter Lewis

Cytotaxonomic studies in the genus Campanula.

Theodorus Wilhelmus Johannes Gadella

Campanulas

Lewis, Peter

Saggio su la distribuzione ecologia e variabilità della Campanula elatinoides Moretti endemismo insubrico

[di] Arietti, G., Fenaroli, L. [e] Giacomini, V.