Παραπομπή APA

Drain, R. H., & Oaakley, N. (1980). Successful conference and convention planning. Sterling.

Παραπομπή Chicago Style

Drain, Robert H., και Neil Oaakley. Successful Conference and Convention Planning. New Delhi: Sterling, 1980.

Παραπομπή MLA

Drain, Robert H., και Neil Oaakley. Successful Conference and Convention Planning. Sterling, 1980.