Cita APA (7a ed.)

Phillips, A. E. (1921). Natural Drills in expression with selections. The Newton Company.

Cita Chicago Style (17a ed.)

Phillips, Arthur Edward. Natural Drills in Expression with Selections. Chicago, Estados Unidos: The Newton Company, 1921.

Cita MLA (9a ed.)

Phillips, Arthur Edward. Natural Drills in Expression with Selections. The Newton Company, 1921.