Year book 1971; covering the year 1970

MLA

Halsey, W.D. Year Book 1971; Covering the Year 1970. Great Britain: Crowell Collier and Macmillan, 1967.

APA

Halsey, W. (1967). Year book 1971; covering the year 1970. Great Britain: Crowell Collier and Macmillan.

Chicago

Halsey, W.D. Year Book 1971; Covering the Year 1970. Great Britain: Crowell Collier and Macmillan, 1967.