APA Style

Wals, P, C., Worthington, J, F. (2001). Dr. Petrick Wal's Guide to Surviving Prostate Cancer . New York: Warner Books.

MLA Style

Wals, Patrick, C.., Worthington, Janet, Farrar. "Dr. Petrick Wal's Guide to Surviving Prostate Cancer". New York: Warner Books, 2001. Kedokteran.