Cita APA (7a ed.)

Billington, L. E. (1950). Word power through spelling. Silver Burdett Company.

Cita Chicago Style (17a ed.)

Billington, Lillian E. Word Power Through Spelling. New York, Chicago, Dallas, San Francisco: Silver Burdett Company, 1950.

Cita MLA (8a ed.)

Billington, Lillian E. Word Power Through Spelling. Silver Burdett Company, 1950.