APA

Campbell B. G., . (1992). Humankind Emerging. New York: Harper Collins Publishers.

Chicago

Campbell Bernard G, . 1992. Humankind Emerging. New York: Harper Collins Publishers.

Harvard

Campbell B. G., . (1992). Humankind Emerging. New York: Harper Collins Publishers.

MLA

Campbell Bernard G, . Humankind Emerging. New York: Harper Collins Publishers. 1992.