Style de citation APA (7e éd.)

Showers, V. (1979). World facts and figures: A unique, authoritative collection of comparative information about cities, countries and geographic features of the world. John Wiley & Sons.

Style de citation Chicago (17e éd.)

Showers, Victor. World Facts and Figures: A Unique, Authoritative Collection of Comparative Information About Cities, Countries and Geographic Features of the World. New York [i 3 pozostałe]: John Wiley & Sons, 1979.

Style de citation MLA (9e éd.)

Showers, Victor. World Facts and Figures: A Unique, Authoritative Collection of Comparative Information About Cities, Countries and Geographic Features of the World. John Wiley & Sons, 1979.