depends on what you are writing it for
every journal has a house style
altho Vancouver referencing used to be v popular
new england journal ( in which I have a few publications Haha ) does it like this
http://www.nejm.org/page/author-center/manuscript-submission#style
and used - since this is shakespeare's birthday - to have an example of quoting from the First Folio
Skakespeare, W, First Folio. London 1616.....
but I see has passed beyond ....
Drazen the new editor ( Brit, Winchester actually ) doesnt have much of a sense of humour