APA (7th ed.) Citation

Ahr, S. W. (2004). Archeological survey for proposed SH 121 at US 75 interchange improvements, Collin County, Texas. Parsons Brinckerhoff Quade & Douglas, Inc..

Chicago Style (17th ed.) Citation

Ahr, Steven W. Archeological Survey for Proposed SH 121 at US 75 Interchange Improvements, Collin County, Texas. Austin, TX: Parsons Brinckerhoff Quade & Douglas, Inc., 2004.

MLA (9th ed.) Citation

Ahr, Steven W. Archeological Survey for Proposed SH 121 at US 75 Interchange Improvements, Collin County, Texas. Parsons Brinckerhoff Quade & Douglas, Inc., 2004.