APA (7th ed.) Citation

Merriam, S. B., & Caffarella, R. S. (1991). Learning in adulthood: A comprehensive guide. Jossey - Bass.

Chicago Style (17th ed.) Citation

Merriam, Sharan B., and Rosemary S. Caffarella. Learning in Adulthood: A Comprehensive Guide. San francisco: Jossey - Bass, 1991.

MLA (9th ed.) Citation

Merriam, Sharan B., and Rosemary S. Caffarella. Learning in Adulthood: A Comprehensive Guide. Jossey - Bass, 1991.