APA (7th ed.) Citation

(1972). Helping Yourself With Numerology. Helyn Hitchcock.

Chicago Style (17th ed.) Citation

Helping Yourself With Numerology. America: Helyn Hitchcock, 1972.

MLA (9th ed.) Citation

Helping Yourself With Numerology. Helyn Hitchcock, 1972.

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