Cita APA (7a ed.)

Barker, R. E. (1956). Books for all: A study of international book trade. UNESCO.

Cita Chicago Style (17a ed.)

Barker, Ronald E. Books for All: A Study of International Book Trade. Paris: UNESCO, 1956.

Cita MLA (9a ed.)

Barker, Ronald E. Books for All: A Study of International Book Trade. UNESCO, 1956.