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.