Wilford, R. Tulips: Species and Hybrids for the Gardener (2006) Timber Press ISBN0881927635
Wilford, R. Alpines, from Mountain to Garden (2010) Royal Botanic Gardens, Kew - Botanical Magazine Monograph ISBN1842461729
Ed. Brian Mathew; Boyce. P, Mayo, S., Wilford, R., Bogner, J. Curtis's Botanical Magazine Volume 12, Part 3, August 1995 - devoted to the Araceae ASIN B007J9IX9U