Gaya APA

Ducruet, C. et al (2009). Emissions from International shipping in the Belgian part of the North Sea and the Belgian seaports . Hongkong: The Hong Kong Polytechnic University.

Gaya MLA

Ducruet, C.. et al. "Emissions from International shipping in the Belgian part of the North Sea and the Belgian seaports". Hongkong: The Hong Kong Polytechnic University, 2009. Article.