APA

Roy F. H., Rusell C., . (1992). The encyclopedia of aging & the elderly / F. Hampton Roy and Charles Russell. New York: Facts on File.

Chicago

Roy Frederick Hampton, Rusell Charles, . 1992. The encyclopedia of aging & the elderly / F. Hampton Roy and Charles Russell. New York: Facts on File.

Harvard

Roy F. H., Rusell C., . (1992). The encyclopedia of aging & the elderly / F. Hampton Roy and Charles Russell. New York: Facts on File.

MLA

Roy Frederick Hampton, Rusell Charles, . The encyclopedia of aging & the elderly / F. Hampton Roy and Charles Russell. New York: Facts on File. 1992.