Book with multiple authors [from Print source using Vancouver]
Give up to six authors in full; abbreviate remaining authors as et al. Remember the only punctuation for authors is a comma between them and a full stop after last author or al.
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.
Author Initials, Author 2 Initials, Author 3 Initials. Title. Nth ed (not needed for 1st ed). Place of publication: Publisher; Year.
Hulley SB, Cummings SR, Browner WS, Grady DG, Newman TB. Designing clinical research. 3rd ed. Philadelphia: Wolters Kluwer; 2007.
Rinsgiven MK, Bond D. Gerontology and leadership skills for nurses. 2nd ed. Albany (NY): Delmar Publishers; 1996.
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.
If Rinsgiven was the third different reference to be used it could be quoted as follows
Rinsgiven (3 p4) states that ......
Rinsgiven3 (p4) states that .........
If both references were being quoted for the first time and being used together the following is possible:
studies have shown (3,4)
studies have shown3,4