APA

Williams J. A., Cox A. G., . (1969). After vagotomy. Londres: Butterworths.

Chicago

Williams J Alexander, Cox Alan G, . 1969. After vagotomy. Londres: Butterworths.

Harvard

Williams J. A., Cox A. G., . (1969). After vagotomy. Londres: Butterworths.

MLA

Williams J Alexander, Cox Alan G, . After vagotomy. Londres: Butterworths. 1969.