APA (7th ed.) Citation

Lindgren, H. C. (1969). Psychology of personal development (2. ed.). American Book Co.

Chicago Style (17th ed.) Citation

Lindgren, Henry Clay. Psychology of Personal Development. 2. ed. New York u.a: American Book Co, 1969.

MLA (9th ed.) Citation

Lindgren, Henry Clay. Psychology of Personal Development. 2. ed. American Book Co, 1969.