Cita APA (7th ed.)

Giovanelli, R. G. Retroreflectors for use on road signs and vehicles / by R.G. Giovanelli.

Cita Chicago (17th ed.)

Giovanelli, R. G. Retroreflectors for Use on Road Signs and Vehicles / by R.G. Giovanelli. Melbourne : Commonwealth Scientific and Industrial Research Organization, Australia, 1954.

Cita MLA (8th ed.)

Giovanelli, R. G. Retroreflectors for Use on Road Signs and Vehicles / by R.G. Giovanelli.