APA (7th ed.) Citation

Ennis, R. H. (1969). Ordinary logic. Prentice-Hall.

Chicago Style (17th ed.) Citation

Ennis, Robert Hugh. Ordinary Logic. Englewood Cliffs, N. J: Prentice-Hall, 1969.

MLA (9th ed.) Citation

Ennis, Robert Hugh. Ordinary Logic. Prentice-Hall, 1969.

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