APA (7th ed.) Citation

Ressang-Vermeij, M. (1994). Proving the value of subscribers. PPA.

Chicago Style (17th ed.) Citation

Ressang-Vermeij, Margaret. Proving the Value of Subscribers. London: PPA, 1994.

MLA (9th ed.) Citation

Ressang-Vermeij, Margaret. Proving the Value of Subscribers. PPA, 1994.

Warning: These citations may not always be 100% accurate.