Rice, G. (1996). The Gardener's guide to perennials. Reed Internationals.
Cita Chicago (17th ed.)Rice, Graham. The Gardener's Guide to Perennials. London: Reed Internationals, 1996.
Cita MLA (9th ed.)Rice, Graham. The Gardener's Guide to Perennials. Reed Internationals, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.