"stax.org/details/books/microbiology. Coccus micrograph: modification of work by Janice Haney Carr, Centers for Disease Control and Prevention. Public Domain. Bacillus micrograph: modification of work by National Institute of Allery and Infectious Diseases. Public Domain. https://commons.wikimedia.org/wiki/File:E._coli_Bacteria_(7316101966).jpg. Vibrio micrograph: modification of work by Janice Haney Carr, Centers for Disease Control and Prevention. Public Domain. https://phil.cdc.gov/Details.aspx?pid=6937. Coccobacillus micrograph: modification of work by Janice Carr, Centers for Disease Control and Prevention. Public Domain. Spirillum micrograph: modification of work by Wolframm Adlassnig. Public Domain. https://commons.wikimedia.org/wiki/File:Spirillen.jpg Spirochete micrograph: modification of work by Centers for Disease Control and Prevention. Public Domain. Table 2.2: Common prokaryotic cell arrangements. (c) Rice University. OpenStax Microbiology. CC BY 4.0. https://openstax.org/details/books/microbiology."