APA (7th ed.) Citation

Harlan, R. D., & Johnson, B. L. (1979). Trends in Modern American Book Publishing.

Chicago Style (17th ed.) Citation

Harlan, Robert D., and Bruce L. Johnson. Trends in Modern American Book Publishing. 1979.

MLA (9th ed.) Citation

Harlan, Robert D., and Bruce L. Johnson. Trends in Modern American Book Publishing. 1979.

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