United States. Bureau of Public Roads & Fertal, M. J. (1967). Modal split; documentation of nine methods for estimating transit usage. U.S. Bureau of Public Roads, Office of Planning; for sale by the Supt. of Docs., U.S. Govt. Print. Off..
Chicagoスタイル(17版)引用形式United States. Bureau of Public Roads , Martin J. Fertal. Modal Split; Documentation of Nine Methods for Estimating Transit Usage. Washington: U.S. Bureau of Public Roads, Office of Planning; for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1967.
MLA(8版)引用形式United States. Bureau of Public Roads , Martin J. Fertal. Modal Split; Documentation of Nine Methods for Estimating Transit Usage. U.S. Bureau of Public Roads, Office of Planning; for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1967.