Book with multiple editors [from Print source using Vancouver]
Referencing a whole edited book is uncommon. You are more likely to be referencing individual chapters as you need to recognize the contributor whose work you are using. Even an introduction may be treated as a chapter. It is fine to have several chapters from one single edited book in your bibliography all recognized as separate entities. See the page for referencing chapters in an edited book.
Don't panic if you see several dates inside the book. The date you need to use is the one which matches the edition of the book that you're using. Ignore any dates that are just listed as reprints or impressions. Look on the book cover and see if it says e.g. Fourth edition (it should also say this on the title page inside the book). In this case all that you need to show in your reference in the bibliography/reference list is the date for the 4th edition of the book (and also give the edition after the book title). Search for the book on the library catalogue to check the details needed for the reference if you are unsure.
Editor1 Initials, Editor2 Initials, Editor3 Initials, editors. Title. Nth ed [omit if 1st ed]. Place of Publication: Publisher; Year.
Denyer SP, Hodges NA, Gorman SP, editors. Hugo and Russell's pharmaceutical microbiology. 7th ed. Oxford: Blackwell Science; 2004.
Hamilton D, Crossley S, editors. Pesticide residues in food and drinking water: human exposure and risks. Chichester: Wiley; 2004.
Citation in Text
Remember this will be a running number at the first use of a reference. If the reference is re-used then repeat the number allocated. Keep your style constant, either parenthesis (number) throughout, or superscript number. Do not change between the two. If your department recommends a particular style then use that.
Infection rates (6) vary from 10% to 50%
Denyer, Hodges and Gorman (6) state that infection rates
Infection rates 6 vary from 10% to 50%