APA

Twycross R. G., Lack S. A., . (1988). Oral morphine : information for patients, families and friends. : Beaconsfield Publishers.

Chicago

Twycross Robert G, Lack Sylvia A, . 1988. Oral morphine : information for patients, families and friends. : Beaconsfield Publishers.

Harvard

Twycross R. G., Lack S. A., . (1988). Oral morphine : information for patients, families and friends. : Beaconsfield Publishers.

MLA

Twycross Robert G, Lack Sylvia A, . Oral morphine : information for patients, families and friends. : Beaconsfield Publishers. 1988.