APA (7th ed.) Citation

Penner, R. J. (1970). The Practice of Charging Users for Information Services: A State of the Art Report.

Chicago Style (17th ed.) Citation

Penner, Rudolf J. The Practice of Charging Users for Information Services: A State of the Art Report. 1970.

MLA (9th ed.) Citation

Penner, Rudolf J. The Practice of Charging Users for Information Services: A State of the Art Report. 1970.

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