edited by Robert N. Singer, Milledge Murphey and L. Keith Tennat
Macmillan, 1993
Buku Referensi
Rumah Sakit Olahraga Nasional, 2015
Majalah, Jurnal, Buletin
Peter Craig
Learning matters Ltd., 2010
Buku Teks
Pargman, David
Prentice-Hall, 1998
Buku Teks
editedby Robert N. Singer, Heather A. Hausenblas and Christopher M. Janelle
Wiley, 2001
Buku Teks