APA (7th ed.) Citation

Jarvik, L. F., & Kratz, H. (1978). Aging into the 21st century: Middle-agers today.

Chicago Style (17th ed.) Citation

Jarvik, Lissy F., and Helene Kratz. Aging into the 21st Century: Middle-agers Today. 1978.

MLA (9th ed.) Citation

Jarvik, Lissy F., and Helene Kratz. Aging into the 21st Century: Middle-agers Today. 1978.

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