APA (7th ed.) Citation
HELGESON, E., & WILLIS, S. (1991). HANDBOOK OF GROUP ACTIVITIES FOR IMPAIRED OLDER ADULTS. THE HAWORTH PRESS.
Chicago Style (17th ed.) Citation
HELGESON, E., and S. WILLIS. HANDBOOK OF GROUP ACTIVITIES FOR IMPAIRED OLDER ADULTS. NUEVA YORK: THE HAWORTH PRESS, 1991.
MLA (9th ed.) Citation
HELGESON, E., and S. WILLIS. HANDBOOK OF GROUP ACTIVITIES FOR IMPAIRED OLDER ADULTS. THE HAWORTH PRESS, 1991.
Warning: These citations may not always be 100% accurate.