APA

National Association of Social Workers, . (1987). Encyclopedia of social work. Silver Spring, Md: National Association of Social Workers.

Chicago

National Association of Social Workers, . 1987. Encyclopedia of social work. Silver Spring, Md: National Association of Social Workers.

Harvard

National Association of Social Workers, . (1987). Encyclopedia of social work. Silver Spring, Md: National Association of Social Workers.

MLA

National Association of Social Workers, . Encyclopedia of social work. Silver Spring, Md: National Association of Social Workers. 1987.