Mason, Jennifer
Qualitative researching
Sage, 2009
 Buku Teks SO
Carr, Chris J.
Law of evidence
Blacstone Press , 1989
 Buku Teks
Gobbo, J.A.
Cross on Evidence
Butterworth, 1970
 Buku Teks
McKibben, Bill
The end of nature
Random House, 1989
 Buku Teks
Postlethwait, John H.
The nature of life
McGraw-Hill Publishing Company, 1989
 Buku Referensi