APA (7th ed.) Citation

Lancaster, F. W., & Goldhor, H. (1981). The Impact of Online Services on Subscriptions to Printed Publications.

Chicago Style (17th ed.) Citation

Lancaster, F. W., and Herbert Goldhor. The Impact of Online Services on Subscriptions to Printed Publications. 1981.

MLA (9th ed.) Citation

Lancaster, F. W., and Herbert Goldhor. The Impact of Online Services on Subscriptions to Printed Publications. 1981.

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