Maybe I was too hard on Harun Yahya. As Wesley writes, plagiarism and theft are common practices among creationists—it’s even encouraged.
Authors such as George Macready Price and Henry M. Morris assembled many of the arguments together in various books. And, as I said, nobody cares if you steal it. In fact, others will be confused if you provide complete references and trace back claims to sources. That just isn’t done as a matter of course in this field, and, of course, it pays to pick up the social gestalt of your new career.
When among knaves and fools, do as they do.