Gaya APA

Ruegger, V. (2000). "Principles and Elements of Free Trade Relations: 40 Year of EFTA Experience . Geneva, Switzerland: Europeann Free Trade Association Secretariat.

Gaya MLA

Ruegger, Verlag.. ""Principles and Elements of Free Trade Relations: 40 Year of EFTA Experience". Geneva, Switzerland: Europeann Free Trade Association Secretariat, 2000. book.