APA

Bardhan K., Phil D., . (1981). Perspectives in duodenal ulcer. Welwyn Garden: Smith Kline & French Laboratories.

Chicago

Bardhan K.D, Phil D, . 1981. Perspectives in duodenal ulcer. Welwyn Garden: Smith Kline & French Laboratories.

Harvard

Bardhan K., Phil D., . (1981). Perspectives in duodenal ulcer. Welwyn Garden: Smith Kline & French Laboratories.

MLA

Bardhan K.D, Phil D, . Perspectives in duodenal ulcer. Welwyn Garden: Smith Kline & French Laboratories. 1981.