Wulffson, D. L., & Dietz, M. (1998). When human heads were footballs: Surprising stories of how sports began (1st Aladdin Paperbacks ed.). Aladdin Paperbacks.
Citación estilo ChicagoWulffson, Don L., and Mike Dietz. When Human Heads Were Footballs: Surprising Stories of How Sports Began. 1st Aladdin Paperbacks ed. New York: Aladdin Paperbacks, 1998.
Cita MLAWulffson, Don L., and Mike Dietz. When Human Heads Were Footballs: Surprising Stories of How Sports Began. 1st Aladdin Paperbacks ed. Aladdin Paperbacks, 1998.
Warning: These citations may not always be 100% accurate.