Gaya APA
Birrer, R, B., Brecher, D, B. (1987).
Common sports injuries in youngsters .
Oradell, NJ:
Medical Economics Books.
Gaya MLA
Birrer, Richard, B.., Brecher, David, B..
"Common sports injuries in youngsters".
Oradell, NJ:
Medical Economics Books,
1987.
Text.