Cita APA (7th ed.)

Askerud, P. (1997). A guide to sustainable book provision. Unesco.

Cita Chicago (17th ed.)

Askerud, Pernille. A Guide to Sustainable Book Provision. París: Unesco, 1997.

Cita MLA (9th ed.)

Askerud, Pernille. A Guide to Sustainable Book Provision. Unesco, 1997.