APA

Ringbom Henrik,, . (1997). Competing norms in the law of marine environmental protection : Focus on ship saftey and pollution prevention. London: Kluwer Law International.

Chicago

Ringbom Henrik,, . 1997. Competing norms in the law of marine environmental protection : Focus on ship saftey and pollution prevention. London: Kluwer Law International.

Harvard

Ringbom Henrik,, . (1997). Competing norms in the law of marine environmental protection : Focus on ship saftey and pollution prevention. London: Kluwer Law International.

MLA

Ringbom Henrik,, . Competing norms in the law of marine environmental protection : Focus on ship saftey and pollution prevention. London: Kluwer Law International. 1997.