Παραπομπή APA

Holliday, I., Langrand, M., & Vickerman, R. W. (1991). Nord-Pas de Calais in the 1990s: A European investment region. London: The Economist Intelligence Unit.

Παραπομπή Chicago Style

Holliday, Ian., Michel Langrand, and Roger William Vickerman. Nord-Pas De Calais in the 1990s: A European Investment Region. London: The Economist Intelligence Unit, 1991.

Παραπομπή MLA

Holliday, Ian., Michel Langrand, and Roger William Vickerman. Nord-Pas De Calais in the 1990s: A European Investment Region. London: The Economist Intelligence Unit, 1991.

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