Παραπομπή APA

Ellis, M. (1973). Why people play. Prentice Hall of India.

Παραπομπή Chicago Style

Ellis, M.J. Why People Play. New Jersey: Prentice Hall of India, 1973.

Παραπομπή MLA

Ellis, M.J. Why People Play. Prentice Hall of India, 1973.