APA (7th ed.) Citation

Phelps, R. B. Timber in the United States economy, 1963, 1967, and 1972.

Chicago Style (17th ed.) Citation

Phelps, Robert B. Timber in the United States Economy, 1963, 1967, and 1972.

MLA (9th ed.) Citation

Phelps, Robert B. Timber in the United States Economy, 1963, 1967, and 1972.

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