APA (7e ed.) Bronvermelding

Bosworth, D. P. (1991). Open learning. Cassell.

Chicago (17e ed.) Bronvermelding

Bosworth, David P. Open Learning. London ; New York: Cassell, 1991.

MLA (8e ed.) Bronvermelding

Bosworth, David P. Open Learning. Cassell, 1991.