APA

Messenger R., . (1967). The doors of opportunity. (A biography of Dame Caroline Haslett, D.B.E. Companion I.E.E.) [Illustrated.]. London: .

Chicago

Messenger Rosalind, . 1967. The doors of opportunity. (A biography of Dame Caroline Haslett, D.B.E. Companion I.E.E.) [Illustrated.]. London: .

Harvard

Messenger R., . (1967). The doors of opportunity. (A biography of Dame Caroline Haslett, D.B.E. Companion I.E.E.) [Illustrated.]. London: .

MLA

Messenger Rosalind, . The doors of opportunity. (A biography of Dame Caroline Haslett, D.B.E. Companion I.E.E.) [Illustrated.]. London: . 1967.