APA
American Heart Association, . (1997). American Heart Association fitting in fitness : hundreds of simple ways to put more physical activity into your life. New York: Times Books.
Chicago
American Heart Association, . 1997. American Heart Association fitting in fitness : hundreds of simple ways to put more physical activity into your life. New York: Times Books.
Harvard
American Heart Association, . (1997). American Heart Association fitting in fitness : hundreds of simple ways to put more physical activity into your life. New York: Times Books.
MLA
American Heart Association, . American Heart Association fitting in fitness : hundreds of simple ways to put more physical activity into your life. New York: Times Books. 1997.