APA (7th ed.) Citation

Ruhl, C. E. (1972). Prerequisites for a theory of coherence. Ruhl.

Chicago Style (17th ed.) Citation

Ruhl, Charles Edward. Prerequisites for a Theory of Coherence. Chapel Hill, N. C.: Ruhl, 1972.

MLA (9th ed.) Citation

Ruhl, Charles Edward. Prerequisites for a Theory of Coherence. Ruhl, 1972.