There are two methods for citing quotations, one for short quotes and one for longer excerpts of text.
If your quotation is fairly brief - up to two lines, say - you should place it in quotation marks within your own paragraph, like so:
One author advises "if you or your child are allergic to a household pet, such as a cat or dog, it is wise to avoid this allergen, and it is strongly recommended that you do not keep such a pet in your home" (Berg, 2003, p.12). Other authors claim...
Note that the author's surname, year and page number are shown in brackets immediately following the quotation.
Your reference list should contain the appropriate reference to the work depending on its source; there is no need to include the specific page number because it has already been included after the quote.