APA (7th ed.) Citation

Treadwell, P. (1992). Life after fifty: : a retirement handbook. Penguin Book.

Chicago Style (17th ed.) Citation

Treadwell, Penny. Life After Fifty: : A Retirement Handbook. England: Penguin Book, 1992.

MLA (9th ed.) Citation

Treadwell, Penny. Life After Fifty: : A Retirement Handbook. Penguin Book, 1992.

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