Cita APA (7a ed.)

Codlin, E. M. (1990). The Aslib directory of information sources in the United Kingdom (6th ed.). Aslib.

Cita Chicago Style (17a ed.)

Codlin, Ellen M. The Aslib Directory of Information Sources in the United Kingdom. 6th ed. London: Aslib, 1990.

Cita MLA (9a ed.)

Codlin, Ellen M. The Aslib Directory of Information Sources in the United Kingdom. 6th ed. Aslib, 1990.