For more than ten authors, list the first ten followed by "et al."
(Author et al. date)
Author AA, Author BB, Author CC, Author DD, Author EE, Author FF, Author GG, Author HH, Author II, Author JJ, et al. Year. Title of book. Place of publication (State or Prov): Publisher name.
(Wenger et al. 1995)
Wenger NK, Sivarajan Froelicher E, Smith LK, Ades PA, Berra K, Blumenthal JA, Certo CM, Dattilo AM, Davis D, DeBusk RF, et al. 1995. Cardiac rehabilitation. Rockville (MD): Agency for Health Care Policy and Research (US).