The following is taken from the "Instructions for Authors" for the Journal of Bacteriology, one of the ASM journals:
(i) References listed in the References section. The References section must include all journal articles (both print and online), books and book chapters (both print and online), patents, theses and dissertations, published conference proceedings, meeting abstracts from published abstract books or journal supplements, letters (to the editor), and company publications, as well as in-press journal articles, book chapters, and books (publication title must be given). As we use the citation-name reference style, arrange the citations in alphabetical order (letter by letter, ignoring spaces and punctuation) by first-author surname and number consecutively. Provide the names of all the authors for each reference; if the author line has six or more authors, the author line will be changed during file conversion of accepted manuscripts to the first author's name plus "et al." per ASM style. All listed references must be cited parenthetically by number in the text. Since title and byline information that is downloaded from PubMed does not always show accents, italics, or special characters, authors should refer to the PDF files or hard-copy versions of the articles and incorporate the necessary corrections in the submitted manuscript. Abbreviate journal names according to the PubMed Journals Database (National Library of Medicine, National Institutes of Health; available at http://www.ncbi.nlm.nih.gov/sites/entrez?db=journals), the primary source for ASM style.
Follow the styles shown in the examples below for print references.
1. Alexander, T. W., et al. 2008. Effect of subtherapeutic administration of antibiotics on the prevalence of antibiotic-resistant Escherichia coli bacteria in feedlot cattle. Appl. Environ. Microbiol. 74:4405-4416.
2. Cox, C. S., B. R. Brown, and J. C. Smith. J. Gen. Genet., in press.* {Article title is optional; journal title is mandatory.}
3. da Costa, M. S., M. F. Nobre, and F. A. Rainey. 2001. Genus I. Thermus Brock and Freeze 1969, 295AL, emend. Nobre, Trüper and da Costa 1996b, 605, p. 404-414. In D. R. Boone, R. W. Castenholz, and G. M. Garrity (ed.), Bergey's manual of systematic bacteriology, 2nd ed., vol. 1. Springer, New York, NY.