APA
Mike Coles ; Richard Gott ; Tony Thornley, . (1989). Active Science 2. Londres: Collins Educational.
Chicago
Mike Coles ; Richard Gott ; Tony Thornley, . 1989. Active Science 2. Londres: Collins Educational.
Harvard
Mike Coles ; Richard Gott ; Tony Thornley, . (1989). Active Science 2. Londres: Collins Educational.
MLA
Mike Coles ; Richard Gott ; Tony Thornley, . Active Science 2. Londres: Collins Educational. 1989.
