Ellis, B. W. (2000). Taylor's guide to ground covers. Houghton Mifflin Co..
Cita Chicago (17th ed.)Ellis, Barbara W. Taylor's Guide to Ground Covers. Boston: Houghton Mifflin Co., 2000.
Cita MLA (9th ed.)Ellis, Barbara W. Taylor's Guide to Ground Covers. Houghton Mifflin Co., 2000.
Atenció: Aquestes cites poden no estar 100% correctes.