Citazione APA

Keylor, W. R. (2012). The encyclopedia of the modern world; vol.II (G-O): 1900 to the present. Viva books.

Stile di citazione Chicago

Keylor, William R. The Encyclopedia of the Modern World; Vol.II (G-O): 1900 to the Present. New Delhi: Viva books, 2012.

Citazione MLA

Keylor, William R. The Encyclopedia of the Modern World; Vol.II (G-O): 1900 to the Present. Viva books, 2012.