SCHOON, J. Geometric Design Projects For Higways: An introduction. American Society of Civil Engineers.
Chicago-viite (17. p.)SCHOON, J.G. Geometric Design Projects For Higways: An Introduction. American Society of Civil Engineers.
MLA-viite (8. p.)SCHOON, J.G. Geometric Design Projects For Higways: An Introduction. American Society of Civil Engineers.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.