APA (7th ed.) Citation

Foucauld, C. d. (1979). Inner search: Letters (1889-1916). Orbis Books.

Chicago Style (17th ed.) Citation

Foucauld, Charles de. Inner Search: Letters (1889-1916). Maryknoll, N.Y.: Orbis Books, 1979.

MLA (8th ed.) Citation

Foucauld, Charles de. Inner Search: Letters (1889-1916). Orbis Books, 1979.