APA

,, . (1992). World resources 1992-93. New York: Oxford University Press.

Chicago

,, . 1992. World resources 1992-93. New York: Oxford University Press.

Harvard

,, . (1992). World resources 1992-93. New York: Oxford University Press.

MLA

,, . World resources 1992-93. New York: Oxford University Press. 1992.