APA

United States, . (1968). Ladders of opportunity: the way out of poverty through community action. Washington: .

Chicago

United States, . 1968. Ladders of opportunity: the way out of poverty through community action. Washington: .

Harvard

United States, . (1968). Ladders of opportunity: the way out of poverty through community action. Washington: .

MLA

United States, . Ladders of opportunity: the way out of poverty through community action. Washington: . 1968.