Lieberman, J. N. (1977). Playfulness: Its relationship to imagination and creativity. Academic Press.
Chicago Style (17th ed.) CitationLieberman, J. Nina. Playfulness: Its Relationship to Imagination and Creativity. New York: Academic Press, 1977.
MLA (9th ed.) CitationLieberman, J. Nina. Playfulness: Its Relationship to Imagination and Creativity. Academic Press, 1977.
Warning: These citations may not always be 100% accurate.