Saddler, G. S., and J. F. Bradbury. "Genus XI. Xylella." In Bergey's Manual of Systematic Bacteriology, edited by G. Garrity, 119-123. 2nd ed. Vol. 2 (The Proteobacteria), Part B (The Gammaproteobacteria). Berlin & Heidelberg, Germany: Springer-Verlag, 2005.
Saddler, G. S., and J. F. Bradbury. "Genus I. Xanthomonas." In Bergey's Manual of Systematic Bacteriology, edited by G. Garrity, 63-91. 2nd ed. Vol. 2 (The Proteobacteria), Part B (The Gammaproteobacteria). Berlin & Heidelberg, Germany: Springer-Verlag, 2005.