Cita APA (7a ed.)

Hartt, R. L. (1909). The people at play. Houghton Mifflin Co..

Cita Chicago Style (17a ed.)

Hartt, Rollin Lynde. The People at Play. Boston New York: Houghton Mifflin Co., 1909.

Cita MLA (8a ed.)

Hartt, Rollin Lynde. The People at Play. Houghton Mifflin Co., 1909.