APA (7th ed.) Citation

Europa Publications Limited. (1990). Who's who in international affairs (1st ed.-.). Europa Publications Ltd.

Chicago Style (17th ed.) Citation

Europa Publications Limited. Who's Who in International Affairs. 1st ed.-. London: Europa Publications Ltd, 1990.

MLA (9th ed.) Citation

Europa Publications Limited. Who's Who in International Affairs. 1st ed.-. Europa Publications Ltd, 1990.