Bergeys manual of Determinative Bacteriology

per Holt, John R, Krieg, Noel R, Sneath, Peter H A, Staley, James T, Williams, Stanley T
Publicat 2000

Bergey's manual of Systematic Bacteriology Vol 1 , The Archaea and the deeply branching and phototrophic bacteria

per Bergeys, Boone, David R, Castenholz, Richard W, Garritty, George M
Publicat 2001