Παραπομπή APA

O'Gorman,, J. (2010). Reference sources for small and medium sized libraries. Ess Ess.

Παραπομπή Chicago Style

O'Gorman,, Jack. Reference Sources for Small and Medium Sized Libraries. New Delhi: Ess Ess, 2010.

Παραπομπή MLA

O'Gorman,, Jack. Reference Sources for Small and Medium Sized Libraries. Ess Ess, 2010.