APA

Sorokin P., . (1928). Contemporary Sociological Theories. New York: Harper and Brothers.

Chicago

Sorokin Pitirim, . 1928. Contemporary Sociological Theories. New York: Harper and Brothers.

Harvard

Sorokin P., . (1928). Contemporary Sociological Theories. New York: Harper and Brothers.

MLA

Sorokin Pitirim, . Contemporary Sociological Theories. New York: Harper and Brothers. 1928.