APA

Greenfield L. J., . (1975). Surgery in the aged. Philadelphia: W.B. Saunders Company.

Chicago

Greenfield Lazar J, . 1975. Surgery in the aged. Philadelphia: W.B. Saunders Company.

Harvard

Greenfield L. J., . (1975). Surgery in the aged. Philadelphia: W.B. Saunders Company.

MLA

Greenfield Lazar J, . Surgery in the aged. Philadelphia: W.B. Saunders Company. 1975.