Kroll, W. P. (1982). Graduate study and research in physical education. Human Kinetics Pubs.
Chicago-referens (17:e uppl.)Kroll, Walter P. Graduate Study and Research in Physical Education. Illinois: Human Kinetics Pubs, 1982.
MLA-referens (9:e uppl.)Kroll, Walter P. Graduate Study and Research in Physical Education. Human Kinetics Pubs, 1982.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.