Gaya APA
ROBERTSON, H, D, [. (1994).
Manual of transportation engineering studies .
Englewood Cliffs, N.J.:
Prentice Hall.
Gaya MLA
ROBERTSON, H., Douglas, [ed.].
"Manual of transportation engineering studies".
Englewood Cliffs, N.J.:
Prentice Hall,
1994.
Buku.