APA
SILVER j. k., . (2001). post -polio syndrome. london: yale university press new haven.
Chicago
SILVER julie k, . 2001. post -polio syndrome. london: yale university press new haven.
Harvard
SILVER j. k., . (2001). post -polio syndrome. london: yale university press new haven.
MLA
SILVER julie k, . post -polio syndrome. london: yale university press new haven. 2001.
