Gaya APA

Hunter, B. (1991). The Statesman's year-book : statistical and historical annual of the states of world for the year 1991-1992 (28th ed). New York: St. Martin`s.

Gaya MLA

Hunter, Brian. "The Statesman's year-book : statistical and historical annual of the states of world for the year 1991-1992". 28th ed New York: St. Martin`s, 1991. Text.