APA (7th ed.) Citation

Hustad, M. W. (1998). An investigation to determine appropriate abbreviations for variable message signs. [publisher not identified].

Chicago Style (17th ed.) Citation

Hustad, Marc William. An Investigation to Determine Appropriate Abbreviations for Variable Message Signs. [Place of publication not identified]: [publisher not identified], 1998.

MLA (9th ed.) Citation

Hustad, Marc William. An Investigation to Determine Appropriate Abbreviations for Variable Message Signs. [publisher not identified], 1998.