Cita APA (7a ed.)

(1929). Manual of standard signs and signals (2nd ed.). State of Minnesota. Department of Highways.

Cita Chicago Style (17a ed.)

Manual of Standard Signs and Signals. 2nd ed. Minessota: State of Minnesota. Department of Highways, 1929.

Cita MLA (9a ed.)

Manual of Standard Signs and Signals. 2nd ed. State of Minnesota. Department of Highways, 1929.