APA (7th ed.) Citation

Claude, R. (1960). The soul of Pier-Giorgio Frassati. Spiritual Book Association.

Chicago Style (17th ed.) Citation

Claude, Robert. The Soul of Pier-Giorgio Frassati. New York: Spiritual Book Association, 1960.

MLA (8th ed.) Citation

Claude, Robert. The Soul of Pier-Giorgio Frassati. Spiritual Book Association, 1960.

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