Cita APA (7a ed.)

Tidwell, M. F. (1949). Speed typing. South-western Pub.

Cita Chicago Style (17a ed.)

Tidwell, M Fred. Speed Typing. Cincinnati: South-western Pub, 1949.

Cita MLA (9a ed.)

Tidwell, M Fred. Speed Typing. South-western Pub, 1949.